System Design Questions
662 comprehensive questions across 12 categories
Showing 661 questions
Design Twitter Timeline
Handle massive user feed with real-time updates and ranking; optimize for writes and near-instant reads.
Design Instagram Feed
Photo-sharing with infinite scrolling, caching, and personalized content ranking.
Design Facebook News Feed
Manage friend networks, content relevance algorithms, and high-scale read/write across billions.
Design LinkedIn Feed
Professional connections, role-based recommendations, content filtering for recruiters vs job seekers.
Design TikTok Recommendation Engine
Short videos, user interaction signals, and advanced recommendation with ultra-low latency.
Design Reddit
Forum-based site with sub-communities, upvote/downvote mechanisms, and time-based ranking.
Design Pinterest
Image-heavy boards, infinite scrolling, sophisticated search, and quick data retrieval.
Design Quora
Q&A platform with question-topic mapping, user reputation systems, and content retrieval.
Design Clubhouse
Real-time audio rooms, ephemeral sessions, user invites, and concurrency at scale.
Design Snapchat Stories
Ephemeral media, direct messaging, short-lived content, and real-time friend presence.
Design Slack Channels
Real-time messaging with channels, threads, presence indicators, and enterprise compliance.
Design Discord
Real-time voice, text, community servers, large concurrency, and role-based permissioning.
Design Bumble or Tinder
Match users based on location/preferences; concurrency, recommendation logic, and swiping.
Design Real-Time Event Feed
Ingest high-frequency data from multiple sources; broadcast user-specific events with minimal delay.
Design Social Graph Analysis
Manage relationships, find mutual connections, and run BFS/graph algorithms on billions of edges.
Design Twitter Spaces
Real-time audio conversations for large audiences with easy creation/discovery.
Design Hashtag Aggregator
Index trending tags, unify results across services, and handle traffic spikes.
Design Nextdoor
Neighborhood-based network requiring address verification and localized feed distribution.
Design Meetup
Organize events by location/topic, manage RSVPs, and suggest relevant groups.
Design Social Presence Service
Show who is online/active, track device connectivity, and broadcast real-time status.
Design Community Forum with Upvotes
Traditional thread-based community with point system; optimize for engagement.
Design Real-Time Polling Platform
Collect instant votes, see dynamic results, handle spiky loads, and ensure fairness.
Design Activity Stream
Aggregate user actions (follows, likes, comments), store and deliver personalized timelines.
Design Online Debate Platform
Structured debate threads with pro/con voting, user reputations, and large text submissions.
Design Follower-Following System
Manage user relationship graphs, quick follow/unfollow writes, and near real-time feed updates.
Design Trending Topics Service
Calculate hashtag velocity, track location-based trends, and handle high-volume queries.
Design Social Recommendation System
Suggest new friends/topics via collaborative filtering and graph-based affinity scoring.
Design Livestream Chat Service
Real-time text flow for thousands of concurrent viewers, plus ephemeral or replayable logs.
Design Multi-Language Social Platform
Handle i18n, content translation, region-based policies, and multi-lingual search indexing.
Design Alumni Networking Platform
Manage .edu verification, graduation year grouping, and specialized job postings.
Design Social Marketplace
Mix social features with e-commerce (likes, shares, listings); handle transactions.
Design Hobby Group Aggregator
Let users discover niche communities; track interest-based subgroups and events.
Design Social Q&A Board
Mini-Quora style focusing on short answers, upvotes, and topic categorization.
Design Endorsements System
Tag user skills, track endorsements, boost credibility, and rank profiles in search.
Design 1-1 Chat in Social Platform
Integrate ephemeral or permanent messaging, read receipts, and push notifications.
Design Mentions Service
Tag and notify users when mentioned in real time, handle spam detection.
Design Content Moderation Pipeline
Automate text/image/video scanning for policy violations; queue for manual review.
Design Anti-Spam Service
Real-time classification of bad content, integrate ML pipelines, propagate blocklists.
Design Social Games/Leaderboards
Track user scores, handle concurrency, store seasonal results, prevent cheating.
Design Event Invitations & RSVPs
Manage large invitation distribution, reminders, and real-time guest count updates.
Design Facebook Groups
Community creation, role-based permissions, pinned announcements, membership management.
Design Real-Time Reaction Stream
Let watchers send emojis on live content; queue and broadcast instantly.
Design Social Gifting Feature
Virtual gifting via coins/tokens, track gift redemption, handle suspicious transactions.
Design Private Family Network
Invite-only membership, secure photo sharing, generational grouping.
Design Auto Tagging / Face Recognition
Use ML for face detection in images, tag recognized users, store metadata securely.
Design Profile Verification System
Confirm identity with docs or selfies; track verification levels, reduce fake accounts.
Design Social Commerce Livestream
Combine real-time video with interactive buy buttons, comments, and transaction backend.
Design Social Search
Index posts, profiles, hashtags; handle typos, synonyms, and real-time indexing.
Design Memories/On This Day
Surface old posts by date, handle privacy for tagged users, and optimize storage retrieval.
Design Creator Analytics Dashboard
Track engagement metrics, follower growth, content performance for creators.
Design a 1-1 Chat Within a Social Platform
Design a durable, real-time, private 1-1 messaging system: per-conversation sequencing, cursor sync, push pipeline, media lifecycle, E2EE options, and trust-and-safety at scale.
Design an Activity Stream for Social Apps
Design a scalable activity stream with event capture, hybrid fanout, grouping, ranked feeds, and real-time updates at social scale.
Design an Auto Tagging / Face Recognition Feature
Design a production face-recognition auto-tagging pipeline with async ML inference, Faiss vector search, biometric consent, and GDPR/BIPA compliance.
Design a Birthday Reminder & Celebration System
Design a timezone-correct, privacy-first birthday reminder and celebration system with day-sharded indexing, idempotent fan-out, dedup ledgers, and consent-gated monetization.
Design a College Alumni Networking Platform
Design a verified, privacy-aware alumni networking platform with identity verification, class-year cohorts, mentorship matching, directory search, and moderation at scale.
Design a Community Forum with Upvotes
Master the community forum system design interview: hot-counter voting at scale, Reddit-style ranking algorithms, threaded discussions, reputation systems, and anti-brigade moderation with real cas...
Design a Content Moderation Pipeline
Design a production content moderation pipeline: bounded sync gate, hash-first async cascade, precision-gated auto-enforcement, leased human review with wellbeing caps, tombstone fan-out, appeals, ...
Design a Distributed Anti-Spam Service
Design a multi-surface anti-spam platform with inline decisions under 50 ms, async deep classification, reputation scoring, campaign containment, and governed policy releases.
Design an Event Invitations & RSVPs System
Design a scalable event invitations and RSVPs platform with fan-out engines, seat ledgers, tiered tallies, durable reminder scheduling, waitlists, and calendar integration across AWS, GCP, and Azure.
Design a Facebook Groups Alternative
Design a governed community platform with hybrid fan-out, role-based governance, membership approvals, pinned announcements, notifications, within-group search, and capacity-planned moderation at 2...
Design a Follower-Following System
Design a billion-edge social follow graph: dual-indexed transactional edges, cache-first reads, celebrity hot-key isolation, reconciled counts, fail-closed privacy, hybrid fan-out, and real-time su...
Design a High-Frequency Mentions Service
Design a real-time mentions and notification pipeline with extraction, abuse-resistant fan-out, aggregation, badge caching, and multi-cloud scale.
Design a Hobby Group Aggregator
Design a discovery-first platform that aggregates millions of hobby micro-communities: hybrid fanout, geo search, recommendations, RSVP capacity, and scalable moderation.
Design a LinkedIn Endorsements System
Design a scalable skill endorsement platform with event-driven count aggregation, suggestion engine, and trust-and-safety at LinkedIn scale.
Design a Multi-Language Social Platform
Design a global multi-language social platform with UI localization, content translation, language detection, multilingual search, feed preferences, caching, and regional compliance.
Design an Online Debate Platform
Design a structured debate platform with argument trees, timed rounds, voting integrity, reputation, moderation, live fan-out, search, and archival at social scale.
Design a Private Social Network for Families
Design an invite-only family platform with capability-based media access, per-family envelope encryption, cycle-safe genealogy, child-safety policy, and proven multi-decade durability.
Design a Profile Verification System
Design a profile verification platform with document forensics, liveness and face matching, tiered badges, and privacy-first retention.
Design a Real-Time Polling Platform
Design a real-time polling platform with durable vote ledgers, layered double-vote prevention, sharded hot tallies, coalesced WebSocket fan-out, scheduled expiration, and fenced close reconciliatio...
Design a Real-Time Reaction/Emoji Stream
Design a live reaction stream with edge tap shaping, windowed aggregation, connection-local fan-out, floating overlay synthesis, replay correlation, rate limiting, and privacy at million-viewer scale.
Design a Social Platform for Audio Books & Clubs
Design a social audiobook platform with DRM-protected streaming, offline listening, book clubs, chapter-anchored discussions with spoiler gating, voice notes, listen-along sync, and multi-cloud scale.
Design Social Games/Leaderboards
Design a real-time social gamification platform with leaderboards, achievements, anti-cheat, and friend-scoped rankings at 10M DAU scale.
Design a Social Gifting Feature
Design virtual gifting at scale: double-entry coin wallet, idempotent sends, live overlay fan-out, notifications, payments, fraud prevention, refunds, and holiday surge capacity across AWS, GCP, an...
Design Social Graph Analysis
Design a planet-scale social graph with source-partitioned edge storage, caching, mutual friends, shortest path, and People You May Know.
Design a Social Marketplace for Products
Design a social marketplace with feeds, single-unit listings, negotiation messaging, protected payments, search, and trust-and-safety at scale.
Design a Social Media Hashtag Aggregator
Design a cross-platform hashtag trending system: multi-source ingestion, canonicalization, two-tier counting, burst scoring, compiled trend lists, caching, and graceful degradation.
Design a Social “Memories” (Lookback) Feature
Design Facebook-style On This Day memories: month-day partitioned historical scanning, timezone-sliced bundle generation, fail-closed privacy re-validation, ML ranking with wellbeing guardrails, an...
Design a Social Presence Service
Design a planet-scale social presence service: multi-device sessions, real-time online/idle/offline propagation, last-seen with privacy coarsening, push-notification reachability, flap-free failove...
Design a Social Recommendation System
Design a Social Recommendation System: architecture, trade-offs and scaling considerations.
Design Bumble or Tinder
Design a location-based dating platform with geo-fenced discovery, real-time match detection, swipe processing, WebSocket messaging, and privacy-preserving architecture.
Design a Trending Topics Service
Design a real-time trending topics service with stream processing, Count-Min Sketch, velocity scoring, spam detection, and multi-cloud architecture.
Design Amazon
Build a complete e-commerce platform with product catalog, cart, checkout, and order management at massive scale.
Design Shopping Cart System
Handle cart persistence, guest checkout, inventory reservation, and cart abandonment recovery.
Design Product Search Engine
Full-text search with faceted filtering, typo tolerance, synonyms, and personalized ranking.
Design Payment Gateway
Process credit cards, handle PCI compliance, fraud detection, and multi-currency support.
Design Inventory Management
Real-time stock tracking across warehouses, prevent overselling, and handle backorders.
Design Order Management System
Track orders from placement to delivery, handle cancellations, returns, and refunds.
Design Product Recommendations
Collaborative filtering, content-based recommendations, and real-time personalization.
Design Checkout Flow
One-click checkout, address validation, tax calculation, and payment processing.
Design Flash Sale System
Handle traffic spikes, inventory limits, fair queuing, and prevent overselling.
Design Dynamic Pricing Engine
Real-time price adjustments based on demand, competition, and inventory levels.
Design Product Catalog
Manage millions of SKUs with attributes, variants, categories, and hierarchies.
Design Reviews & Ratings System
Collect and display product reviews, handle spam, and compute aggregate ratings.
Design Wishlist System
Save items for later, share wishlists, and notify on price drops.
Design Coupon & Promotions
Create and validate coupons, handle stacking rules, and prevent fraud.
Design Multi-Vendor Marketplace
Onboard sellers, split payments, handle disputes, and manage seller ratings.
Design Shipping & Logistics
Calculate shipping rates, integrate carriers, and provide real-time tracking.
Design Warehouse Management
Optimize storage, picking routes, and inventory placement across facilities.
Design Subscription Commerce
Recurring billing, subscription management, and churn prediction.
Design Returns Processing
Handle return requests, refund processing, and restocking workflows.
Design Loyalty Program
Track points, manage tiers, and handle redemption across channels.
Design Auction System
Real-time bidding, bid increments, proxy bidding, and auction closing.
Design Price Comparison Engine
Aggregate prices from multiple sources, track history, and alert on drops.
Design E-Commerce Fraud Detection
Detect fraudulent orders using ML, device fingerprinting, and behavioral analysis.
Design B2B Ordering Platform
Handle bulk orders, net terms, purchase orders, and approval workflows.
Design Dropshipping Platform
Connect merchants with suppliers, automate order routing, and handle inventory sync.
Design Gift Card System
Issue, redeem, and track gift cards with fraud prevention and balance management.
Design Tax Calculation Engine
Calculate sales tax across jurisdictions, handle exemptions, and generate reports.
Design Personalization Engine
Customize product displays, emails, and offers based on user behavior.
Design Affiliate Marketing System
Track referrals, calculate commissions, and manage affiliate relationships.
Design Grocery Delivery Platform
Handle perishables, time slots, substitutions, and last-mile delivery.
Design Product Bundling
Create and price bundles, manage inventory deductions, and track performance.
Design Size Recommendation
Use ML to recommend sizes based on measurements and return data.
Design Visual Search
Find products by uploading images using computer vision.
Design Voice Commerce
Enable shopping via voice assistants with NLU and confirmation flows.
Design AR Try-On Experience
Virtual try-on for clothes, glasses, or makeup using AR.
Design Price Alert System
Track prices and notify users when items drop below threshold.
Design Product Q&A
Allow customers to ask questions, route to sellers, and display answers.
Design Real-Time Order Tracking
Live tracking with carrier integration and delivery notifications.
Design Address Validation
Verify and standardize addresses to reduce shipping errors.
Design Split Payment System
Allow multiple payment methods per order and handle partial refunds.
Design Product Waitlist
Manage waitlists for out-of-stock items with fair notification.
Design Store Locator
Find nearby stores with inventory availability and hours.
Design Buy Online Pickup In Store
Reserve inventory, handle pickup windows, and verify customers.
Design Bulk Product Import
Handle CSV/API imports for large catalogs with validation.
Design Currency Conversion
Real-time FX rates, multi-currency checkout, and settlement.
Design Abandoned Cart Recovery
Track abandonment, send reminders, and measure recovery rates.
Design Product Comparison
Side-by-side feature comparison with attribute normalization.
Design Seller Dashboard
Analytics, inventory management, and order processing for sellers.
Design Product Syndication
Distribute product data to multiple channels and marketplaces.
Design Customer Segmentation
Segment customers by behavior, value, and preferences for targeting.
Design WhatsApp
End-to-end encrypted messaging with billions of users, real-time delivery, and media sharing.
Design Zoom
Video conferencing for millions of concurrent meetings with screen sharing and recording.
Design Slack
Team messaging with channels, threads, search, and integrations at enterprise scale.
Design WebRTC Platform
Peer-to-peer video/audio with TURN/STUN servers and adaptive bitrate.
Design Push Notification System
Reliable delivery to billions of devices across iOS, Android, and web.
Design Facebook Messenger
Rich messaging with reactions, replies, bots, and cross-platform sync.
Design Google Meet
Browser-based video meetings with live captions and calendar integration.
Design Telegram
Cloud-based messaging with channels, bots, and large file sharing.
Design Twilio-like Communication API
Programmable SMS, voice, and video APIs with global carrier network.
Design Google Docs Real-Time Editing
Operational transformation or CRDTs for concurrent document editing.
Design WebSocket Gateway
Handle millions of persistent connections with load balancing and failover.
Design SMS Gateway
Route messages through carriers with delivery receipts and failover.
Design VoIP System
Internet calling with SIP, quality monitoring, and PSTN bridging.
Design Intercom
Customer messaging platform with live chat, bots, and CRM integration.
Design Call Center Platform
IVR, call routing, agent management, and call recording.
Design Live Video Streaming
Broadcast to thousands with adaptive bitrate and low latency.
Design Webinar Platform
Large-scale presentations with Q&A, polls, and attendee management.
Design Email Delivery System
Reliable email sending with reputation management and deliverability.
Design Typing Indicator
Real-time typing status with debouncing and privacy controls.
Design Read Receipts
Track message delivery and read status with privacy options.
Design Message Search
Full-text search across conversations with filters and highlighting.
Design Screen Sharing
Capture and stream desktop with annotation and remote control.
Design Group Video Calling
Multi-party video with selective forwarding and layout management.
Design Chatbot Platform
Build and deploy conversational bots with NLU and integrations.
Design Notification Preferences
User-controlled notification settings across channels and devices.
Design Message Queue for Chat
Ordered delivery, deduplication, and offline message handling.
Design Voice Message System
Record, store, and play voice messages with transcription.
Design Message Reactions
Add emoji reactions with aggregation and real-time updates.
Design Message Threads
Nested conversations with context preservation and notifications.
Design File Sharing in Chat
Upload, preview, and manage files with storage and permissions.
Design Meeting Recording
Record, process, and store video meetings with transcription.
Design Live Captions
Real-time speech-to-text for video calls with speaker identification.
Design Virtual Background
ML-based background replacement for video calls.
Design Breakout Rooms
Split meetings into smaller groups with host controls.
Design Waiting Room
Queue participants before admitting to meetings with host approval.
Design Scheduled Messages
Schedule messages for future delivery with timezone handling.
Design Message Pinning
Pin important messages with retrieval and management.
Design Message Forwarding
Forward messages across conversations with attribution.
Design Disappearing Messages
Auto-delete messages after time period with client coordination.
Design Rich Message Formatting
Markdown, code blocks, and rich embeds in messages.
Design Link Preview
Fetch and display rich previews for shared URLs.
Design Custom Status
Set custom status with emoji, text, and expiration.
Design Do Not Disturb
Pause notifications with schedules and exceptions.
Design Message Translation
Translate messages in real-time across languages.
Design Quick Audio Huddle
Instant audio calls within channels without scheduling.
Design Call Quality Monitoring
Track and optimize audio/video quality with metrics.
Design Bandwidth Adaptation
Adjust video quality based on network conditions.
Design Message Export
Export conversation history with compliance features.
Design Cross-Platform Sync
Sync messages and state across devices seamlessly.
Design Message Retention
Configure retention policies for compliance and storage.
Design an Event-Driven Notification Hub
Design an event notification hub: pub/sub decoupling producers from channels, fan-out with preference resolution, at-least-once delivery with idempotent dedup, dead-letter handling, ordering, prior...
Design a Live Translation Chat App
Design a live translation chat: per-recipient-locale machine translation on delivery, a language-pair translation cache with single-flight dedup, source-language detection, and fail-open fallback.
Design a Telemedicine Video Chat
Design a HIPAA-compliant telemedicine video chat: appointment-scoped minimum-necessary access, encryption in transit and at rest with a KMS, secure document exchange, e-prescription, and a tamper-e...
Design a Virtual Call Center
Design a virtual call center: an ACD with skill-based priority routing, atomic serialized assignment, agent presence, WebRTC media bridging, a manager dashboard, and mid-contact failover.
Design a Real-Time Analytics Pipeline
Construct a pipeline that ingests high-velocity data (e.g., logs, clickstreams), processes in near real time (aggregations...
Design a Data Warehouse (Snowflake/BigQuery)
A system optimized for analytical (OLAP) queries over massive structured/semi-structured data.
Design a Log Analytics Platform (Splunk-like)
A platform to ingest, parse, and index massive logs from various sources.
Design an Ad Click-Through Tracking System
Collect user clicks from ads, match them to impressions, and generate real-time or near real-time dashboards for advertisers.
Design a Recommendation ML Pipeline
Build a pipeline that ingests user-event data (clicks, views, purchases), transforms them into ML features, periodically retrains a...
Design a Data Pipeline with Kafka & Spark
Use Kafka as the ingestion backbone for high-throughput event data.
Design a Data Governance & Lineage System
Implement a system that catalogs all datasets, tracks transformations (ETL pipelines), clarifies ownership, and ensures compliance...
Design a Fraud Analytics Engine
Identify suspicious patterns in financial transactions or user activities.
Design a Data Lake (Hadoop/S3)
Store large volumes of raw data (logs, CSV, JSON, etc.) in a distributed file system or object store.
Design a Real-Time Leaderboard Analytics
Maintain a live, updated leaderboard for millions of users or players.
Design a Data Quality Validation Framework
Implement a system that checks incoming or batch data for validation errors or anomalies.
Design a Session Analysis & Heatmap Tool
Record user interactions on websites (cursor moves, clicks, scrolls), store sessions, and create heatmaps or funnel analyses.
Design a Predictive Maintenance System
Sensors stream temperature, vibration, or usage data from machines.
Design a Web Analytics Tracker (Google Analytics-like)
A snippet on each webpage sends events (page load, custom event) to a data collector.
Design a Cohort Analysis Platform
Group users by a shared start event (e.g., sign-up week), track their retention or behavior over subsequent periods (days/weeks).
Design a Stream-Processing ML Feature Extraction
Incoming events require on-the-fly feature generation (counts, last N event patterns, session stats).
Design a Distributed OLAP Cube
Pre-compute aggregates (sums, counts, averages) by various dimensions (time, region, product) for lightning-fast analytics.
Design a Recommendation Feedback Loop
Collect user actions (did they click recommended item? skip?), feed that data back into the recommendation pipeline.
Design an IoT Analytics Platform
Collect sensor readings from thousands or millions of devices, transform or aggregate them (e.g., average temperature, anomaly...
Design a Multi-Region Data Replication Strategy
Set up a system where data ingested in multiple geographic locations is replicated to a central or distributed cluster for analytics...
Design a Data Privacy & Compliance Masking Service
Intercept or transform sensitive columns (PII, protected health info) with anonymization, tokenization, or encryption.
Design a Reporting & Scheduled Jobs Framework
Users define recurring queries or analytics scripts.
Design a Business Intelligence "Self-Service" Tool
A web-based platform where business users can explore data, join tables, create visualizations, pivot charts, etc., all without writing...
Design a Cross-Platform Gaming Analytics
A gaming analytics system that ingests events from multiple platforms.
Design a Predictive Alert System (Spam/Abuse)
Ingest user activities (posts, messages, login patterns), run anomaly detection or ML classification to predict potential spam or abuse.
Design a Dedicated Feature Store for ML
A repository where ML features are consistently stored, updated, and served to both training pipelines (batch) and real-time inference...
Design a Query Suggestion & Autocomplete for Analytics
A system that tracks metadata (table schemas, column types, popular queries) and suggests partial or complete queries as the user types...
Design a MLOps Pipeline
Automate the entire ML lifecycle: from data ingestion, feature engineering, training, offline validation, to model packaging and...
Design a Large-Scale Email Campaign Metrics Tracker
After sending bulk emails, the system collects open/click events, unsubscribes, bounces in near real-time.
Design a Financial Trading Backtest System
Load historical price ticks or order book data, simulate trading strategies over that timeframe, track P&L, drawdowns, or risk metrics.
Design a Data Retention & Archival Workflow
Automatically move older data from hot (fast, expensive) storage to cold or archival layers (cheaper, slower) after a certain age...
Design a Recommendation A/B Testing Manager
Admin can create experiments comparing multiple recommendation models or parameter sets.
Design a Realtime NLP Pipeline
Messages arrive from a high-volume feed.
Design a Massive Graph Database for E-Commerce
Represent users, brands, and product categories as nodes, edges for relationships (purchases, brand tags).
Design a Geospatial Analytics Platform
Collect location-based data (e.g., driver pings, store locations), run queries like “all events within X km in last Y hours,” or...
Design a Voice Command Analytics Tool
Users speak commands to a device, which transcribes them.
Design an Ad Inventory Forecasting System
Given historical impression data and current traffic patterns, predict how many ad impressions can be served in upcoming days/weeks...
Design a Data Anomaly Detection Pipeline
A pipeline ingesting metrics or logs, applying real-time or batch-based anomaly detection methods.
Design a Data Consistency Checker for ETL Pipelines
After each ETL run, compare source vs.
Design a Data Pipeline for Genomics Analysis
Manage ingestion of raw DNA sequencing data (FASTQ, BAM), store it, run variant calling or other analytics in HPC or distributed...
Design a Satellite Imagery Analytics Workflow
Ingest raw satellite images, store them (maybe in a tile-based approach), run batch or streaming classification (e.g., detecting...
Design a Real-Time Document Processing & Extraction
Automatically process incoming documents (contracts, invoices).
Design an IoT Fleet Monitoring & Analytics
Track thousands of vehicles or devices, receiving location/telemetry.
Design a Centralized Metadata & Schema Registry
A system that stores schema definitions for multiple data streams/tables, tracks version changes, provides compatibility checks, and...
Design a ML Model Monitoring & Drift Detection
Continuously track model input distributions vs.
Design a Large-Scale Financial Market Data Lake
A central repository for all intraday trades, quotes, order book snapshots from multiple exchanges.
Design a Pricing Optimization Analytics
Collect competitor price data, inventory levels, demand signals, and run analytics or ML models to set/adjust product prices in near...
Design a Data “Sandbox” Environment
Create a sandbox zone where data scientists spin up ephemeral clusters, run queries or experiments on a subset or masked dataset...
Design a “Usage-based Billing” Analytics System
Collect usage events (API calls, CPU time, requests) from each tenant, store them in near real-time, compute daily or monthly usage...
Design a Synthetic Data Generation & Analytics Platform
Build a system that learns real data distributions, then produces synthetic records that preserve statistical properties but strip or...
Design YouTube
Video upload, transcoding, CDN delivery, and recommendation at massive scale.
Design Netflix
Video streaming with adaptive bitrate, personalization, and global CDN.
Design Spotify
Music streaming with playlists, discovery, and offline mode.
Design Twitch
Live streaming platform with chat, subscriptions, and low latency.
Design Video Transcoding Pipeline
Convert videos to multiple formats and resolutions at scale.
Design Content Delivery Network
Distribute content globally with caching, routing, and edge computing.
Design TikTok
Short-form video with powerful recommendations and creator tools.
Design Podcast Platform
Host, distribute, and monetize podcasts with analytics.
Design Image Hosting Service
Upload, process, and serve billions of images efficiently.
Design Live Sports Streaming
Ultra-low latency streaming for live events with millions of viewers.
Design Video Player
Adaptive streaming with DRM, analytics, and accessibility.
Design Video Recommendations
Personalized video suggestions based on viewing history.
Design Music Discovery
Weekly playlists and radio based on listening patterns.
Design Video Upload System
Handle large file uploads with resumable uploads and validation.
Design DRM System
Protect content with encryption and license management.
Design Video Search
Search across video metadata, transcripts, and visual content.
Design Video Analytics
Track views, engagement, and quality metrics at scale.
Design Video Content Moderation
Detect and remove policy-violating content using ML.
Design Adaptive Bitrate Streaming
Adjust quality based on network conditions dynamically.
Design Video Thumbnail Generation
Generate and optimize thumbnails for engagement.
Design Live Video Comments
Real-time comments synced with video playback.
Design Video Chapters
Auto-generate and display chapter markers for navigation.
Design Subtitles System
Generate, store, and display captions in multiple languages.
Design Audio Fingerprinting
Identify songs from audio samples like Shazam.
Design Playlist System
Create, share, and collaborate on media playlists.
Design Video Encoding Farm
Distributed encoding with job scheduling and quality control.
Design Video Storage System
Store petabytes of video with tiered storage and retrieval.
Design Watch Party Feature
Synchronized viewing experience for remote groups.
Design Creator Monetization
Ads, subscriptions, and tips for content creators.
Design Video Ad Insertion
Server-side ad insertion with targeting and measurement.
Design Video Preview on Hover
Generate and serve preview clips for thumbnails.
Design Watch History
Track and sync viewing progress across devices.
Design Video Quality Selector
Manual quality selection with bandwidth estimation.
Design Video Clipping Tool
Create and share clips from longer videos.
Design Playback Speed Control
Variable speed playback with audio pitch correction.
Design Offline Video Download
Download videos for offline viewing with DRM.
Design Live Stream Polls
Interactive polls during live broadcasts.
Design Virtual Events Platform
Ticketed virtual concerts and events at scale.
Design Video Effects Pipeline
Apply filters and effects in real-time.
Design Audio Processing Pipeline
Noise reduction, normalization, and enhancement.
Design Video Watermarking
Embed invisible watermarks for piracy tracking.
Design Music Licensing System
Track usage and distribute royalties to rights holders.
Design AI Video Dubbing
Auto-translate and dub videos using AI voices.
Design Video Synopsis Generator
Auto-generate summaries and highlights from videos.
Design Screen Recording Platform
Record, edit, and share screen recordings.
Design Video Collaboration
Comment and annotate on specific video timestamps.
Design Audio Transcription Service
Convert speech to text with speaker diarization.
Design CDN Routing Optimization
Route viewers to optimal CDN edges.
Design Video Manifest Server
Generate and serve HLS/DASH manifests dynamically.
Design Video Prefetching
Predictively load content for seamless playback.
Design SoundCloud
How to design SoundCloud: audio upload + transcoding, waveform generation, adaptive streaming, the follow/repost social graph, The Stream feed fan-out, search, and play-count analytics at scale.
Design CI/CD Pipeline
Automate build, test, deploy with parallel jobs, artifacts, and rollback capabilities.
Design Kubernetes
Container orchestration with scheduling, auto-scaling, and service discovery.
Design Feature Flag System
Toggle features at runtime with targeting, gradual rollouts, and analytics.
Design Blue-Green Deployment
Zero-downtime deployments with instant rollback and traffic switching.
Design Canary Release System
Gradual rollouts with automated metrics analysis and rollback.
Design Serverless Platform
Function-as-a-service with cold starts, scaling, and event triggers.
Design Infrastructure as Code
Manage resources with declarative configs, state tracking, and drift detection.
Design Container Registry
Store and distribute container images with scanning and access control.
Design Monitoring & Alerting
Collect metrics, define alerts, and visualize system health at scale.
Design Auto-Scaling System
Scale infrastructure based on metrics with predictive and reactive modes.
Design Multi-Region Deployment
Deploy across regions with data replication and failover.
Design Rolling Update Strategy
Update instances gradually while maintaining availability.
Design Log Aggregation
Collect, index, and search logs from distributed systems.
Design Configuration Management
Manage configs across environments with versioning and secrets.
Design Release Orchestration
Coordinate releases across services with approvals and gates.
Design GitOps Workflow
Git as single source of truth with automated sync and drift detection.
Design Build Farm
Distributed builds with caching, parallelization, and artifact management.
Design Database Migration Pipeline
Safe schema changes with backwards compatibility and rollback.
Design DevSecOps Pipeline
Integrate security scans, compliance checks, and vulnerability detection.
Design Chaos Engineering Platform
Test system resilience with controlled failure injection.
Design Ephemeral Environments
On-demand preview environments for every pull request.
Design Immutable Infrastructure
Replace rather than modify servers with versioned images.
Design Service Mesh
Handle service-to-service communication with mTLS and observability.
Design Secrets Management
Store, rotate, and access secrets securely at scale.
Design Cloud Cost Optimization
Track, analyze, and reduce cloud spending automatically.
Design Incident Management
Alert routing, escalation, and on-call scheduling.
Design Artifact Repository
Store and manage build artifacts with versioning and proxying.
Design Deployment Verification
Automated health checks and smoke tests after deployment.
Design Traffic Management
Route traffic with load balancing, rate limiting, and circuit breaking.
Design Backup and Recovery
Automated backups with point-in-time recovery and DR testing.
Design Helm/Operator System
Template Kubernetes deployments with parameterization.
Design Monorepo CI
Efficient CI for large monorepos with affected-only builds.
Design Release Notes Automation
Generate changelogs from commits and PRs automatically.
Design Code Freeze Mechanism
Lock deployments during critical periods with exceptions.
Design SLA Monitoring
Track SLA compliance with alerts and reporting.
Design CI Plugin System
Extensible CI with custom actions and integrations.
Design Environment Promotion
Promote builds through dev, staging, and production.
Design Resource Quotas
Limit resource usage per team or namespace.
Design Pod Scheduling
Optimize container placement with affinity and constraints.
Design Health Check System
Liveness, readiness, and startup probes for services.
Design Log Rotation
Manage log files with rotation, compression, and retention.
Design Certificate Management
Issue, renew, and distribute TLS certificates automatically.
Design Network Policies
Control traffic between services with security rules.
Design Container Security
Scan, sign, and secure container images.
Design Developer Portal
Self-service portal for infrastructure and services.
Design Runbook Automation
Automate operational procedures with triggered playbooks.
Design Deployment Dashboard
Visualize deployment status across services and environments.
Design Dependency Update Automation
Automatically update dependencies with PR creation.
Design Debug Container System
Attach debug containers to running pods for troubleshooting.
Design Capacity Planning
Forecast resource needs based on historical data.
Design Authentication System
OAuth, SSO, MFA with session management and token refresh at scale.
Design Rate Limiter
Distributed rate limiting with multiple algorithms and quotas.
Design API Gateway
Central entry point with auth, rate limiting, and request transformation.
Design Distributed Tracing
Track requests across services with spans and context propagation.
Design Web Application Firewall
Protect against OWASP attacks with rule-based filtering.
Design DDoS Protection
Mitigate volumetric and application-layer attacks at scale.
Design Identity Management
User provisioning, RBAC, and access governance at enterprise scale.
Design SIEM System
Collect, correlate, and analyze security events for threat detection.
Design Encryption Service
Key management, encryption at rest and in transit, with HSM integration.
Design Zero Trust Architecture
Never trust, always verify with continuous authentication.
Design Access Control System
Fine-grained permissions with policies, roles, and inheritance.
Design Audit Logging
Immutable audit trails with tamper detection and compliance.
Design Vulnerability Scanner
Scan infrastructure and code for security vulnerabilities.
Design CAPTCHA System
Distinguish humans from bots with adaptive challenges.
Design Fraud Detection System
ML-based detection of fraudulent transactions and accounts.
Design Password Manager
Secure password storage, generation, and sync across devices.
Design Bot Detection
Identify and block malicious bots with behavioral analysis.
Design Certificate Transparency
Monitor and detect mis-issued TLS certificates.
Design Incident Response Platform
Coordinate security incident investigation and remediation.
Design Threat Intelligence Platform
Aggregate and analyze threat data from multiple sources.
Design Session Management
Secure session handling with timeout, invalidation, and hijacking prevention.
Design API Security
Protect APIs with authentication, authorization, and validation.
Design Data Classification
Automatically classify and tag sensitive data.
Design Data Loss Prevention
Detect and prevent sensitive data exfiltration.
Design Privileged Access Management
Secure and audit privileged account access.
Design Single Sign-On
One login for multiple applications with SAML/OIDC.
Design Key Rotation System
Automated key rotation with zero-downtime migration.
Design Compliance Monitoring
Continuous compliance checks against security standards.
Design Security Dashboard
Unified view of security posture and metrics.
Design APM System
Application performance monitoring with traces and metrics.
Design IP Reputation Service
Score and block malicious IP addresses.
Design Email Security Gateway
Filter spam, phishing, and malware from email.
Design Endpoint Detection
Detect and respond to threats on endpoints.
Design Security Code Scanning
Static and dynamic analysis for vulnerabilities.
Design Network Monitoring
Monitor network traffic for anomalies and threats.
Design Token Management
Issue and validate JWT/OAuth tokens securely.
Design Password Policy Engine
Enforce and validate password requirements.
Design Device Trust
Verify device health and compliance before access.
Design User Behavior Analytics
Detect anomalous user behavior patterns.
Design Firewall Rules Engine
Manage and evaluate network security rules.
Design Security Scoring
Calculate and track organizational security score.
Design Phishing Detection
Identify and block phishing attempts.
Design Security Automation
SOAR platform for automated response workflows.
Design Anomaly Detection
ML-based detection of unusual patterns in data.
Design Secure File Transfer
Encrypted file transfer with audit and compliance.
Design Security Headers Service
Manage and enforce HTTP security headers.
Design Malware Scanning
Scan files and URLs for malicious content.
Design Security Questionnaire
Automate vendor security assessments.
Design Privacy Consent Management
Manage user consent for data processing.
Design Status Page
Public status page with incident communication.
Design Google Docs
Real-time collaborative document editing with OT/CRDTs and offline support.
Design Notion
Flexible workspace with blocks, databases, and real-time collaboration.
Design Jira
Issue tracking with workflows, sprints, and customizable fields.
Design Salesforce CRM
Customer relationship management with pipelines and automation.
Design Figma
Collaborative design tool with multiplayer editing and component systems.
Design Confluence
Team wiki and documentation platform with spaces and permissions.
Design Google Calendar
Scheduling with recurring events, invites, and availability.
Design Project Management Tool
Tasks, timelines, dependencies, and resource allocation.
Design Dropbox
Cloud file storage with sync, sharing, and versioning.
Design Digital Whiteboard
Real-time collaborative whiteboard with drawing and sticky notes.
Design Zapier
Connect apps with automated workflows and triggers.
Design Evernote
Note-taking with rich text, attachments, and powerful search.
Design DocuSign
Electronic signatures with workflows and legal compliance.
Design Desktop Sync Client
Continuous folder sync with conflict resolution.
Design Portfolio Management
Aggregate multiple projects with resource planning.
Design Corporate Intranet
Internal portal with news, search, and employee directory.
Design Expense Management
Receipt capture, approval workflows, and reimbursement.
Design Performance Review Tool
Goals, feedback, and reviews with HR integration.
Design Mind Mapping Tool
Visual brainstorming with collaborative editing.
Design Contract Lifecycle Management
Draft, negotiate, sign, and archive contracts.
Design Org Chart & Directory
Employee hierarchy with search and profiles.
Design White-Label Office Suite
Documents, spreadsheets, and presentations with branding.
Design Unified Chat + Task Platform
Combined messaging, tasks, and calendar for teams.
Design Applicant Tracking System
Candidate pipeline with resume parsing and scheduling.
Design Secure Collaboration Hub
Granular permissions and versioned file sharing.
Design Employee Onboarding
Automated onboarding tasks and form collection.
Design M&A Deal Room
Secure document sharing for legal and financial deals.
Design Resume Builder
Templates, real-time editing, and PDF export.
Design Bug Bounty Platform
Vulnerability submissions with triage and payouts.
Design Virtual Team Building
Online games and activities for remote teams.
Design Presentation Collaboration
Real-time slide editing with presenter view.
Design Cloud IDE
Browser-based coding with containers and collaboration.
Design Training & Certification
Courses, quizzes, and certificate issuance.
Design Survey & Polling Tool
Create surveys with analytics and segmentation.
Design SLA Tracking Dashboard
Track service levels with credits and penalties.
Design ChatOps Platform
Execute commands via chat with bot integrations.
Design Corporate Card System
Virtual cards with budgets and real-time tracking.
Design OKR Tracking Tool
Goals and key results with progress tracking.
Design Print Management
Central queue with authentication and tracking.
Design Internal Q&A Forum
Stack Overflow for teams with knowledge base.
Design Employee Rewards
Points, leaderboards, and reward redemption.
Design Meeting Room Booking
Real-time availability with check-ins and displays.
Design Daily Standup Bot
Automated standup collection and summaries.
Design Approval Workflow Engine
Multi-step approvals with routing and escalation.
Design Form Builder
Drag-and-drop forms with conditional logic.
Design Time Tracking
Track time with projects, reports, and billing.
Design Visitor Management
Check-in visitors with badges and notifications.
Design IT Asset Management
Track hardware and software assets with lifecycle.
Design Help Desk System
Ticket management with SLAs and knowledge base.
Design Employee Feedback
Anonymous feedback with pulse surveys.
Design Lyft
Ride-hailing with driver matching, surge pricing, and ride modes.
Design DoorDash
Food delivery with restaurant matching, driver dispatch, and real-time tracking.
Design Grab or Gojek (Super App)
Multi-vertical super app with rides, food delivery, payments, and financial services.
Design Google Maps
Navigation with routing, traffic, and real-time updates.
Design Shipment Tracking
Track packages across carriers with real-time updates.
Design Fleet Management
Track and manage vehicle fleets with telematics.
Design Route Optimization
Optimize delivery routes for time and fuel efficiency.
Design Carpooling Platform
Match commuters for shared rides with cost splitting.
Design Last Mile Delivery
Optimize final delivery leg with crowdsourced drivers.
Design EV Charging Network
Find, reserve, and pay for charging stations.
Design Smart Parking System
Find and reserve parking with real-time availability.
Design Bike Sharing System
Dock-based or dockless bike rentals with availability.
Design a Bus Tracking & Route Optimization System
Real-time bus tracking with GTFS, ETA prediction, and route optimization.
Design E-Scooter Platform
Scooter rentals with geofencing and battery management.
Design a Scooter/Bike Sharing Platform
Dockless micromobility with IoT, geofencing, and fleet management.
Design Driver Allocation System
Optimize driver positioning based on demand prediction.
Design Surge Pricing Engine
Dynamic pricing based on supply and demand.
Design Ride Matching Algorithm
Optimal driver-rider matching with constraints.
Design ETA Prediction
Predict arrival times with traffic and ML models.
Design Warehouse Robotics
Coordinate autonomous robots for picking and packing.
Design Truck Load Optimization
Optimize truck routes and loads for freight.
Design Public Transit App
Real-time schedules, delays, and trip planning.
Design Driver Onboarding
Background checks, vehicle validation, and training.
Design Driver Earnings System
Calculate and display earnings with instant pay.
Design Delivery Scheduling
Schedule deliveries with time windows and priorities.
Design Geofencing System
Define and enforce geographic boundaries.
Design Ride Safety Features
Emergency buttons, trip sharing, and driver verification.
Design Driver Rating System
Two-way ratings with quality metrics and deactivation.
Design Food Ordering Flow
Menu browsing, customization, and order placement.
Design Restaurant Dashboard
Order management, menu updates, and analytics.
Design Delivery Batching
Group multiple orders for efficient delivery.
Design Toll Calculation
Calculate and display tolls for routes.
Design Fuel Optimization
Optimize routes and driving behavior for fuel efficiency.
Design Dispatch System
Assign and track jobs for field workers.
Design Smart Locker System
Package delivery to secure lockers with pickup codes.
Design Driver Incentive System
Bonuses, challenges, and gamification for drivers.
Design Proof of Delivery
Capture signatures, photos, and delivery confirmation.
Design Driver Scheduling
Shift scheduling with availability and preferences.
Design Ride Subscription
Monthly passes with discounts and perks.
Design Vehicle Maintenance Tracking
Schedule and track vehicle service and repairs.
Design Driver-Rider Chat
In-app messaging with masked phone numbers.
Design Ride History
Store and display past trips with receipts.
Design Saved Places
Save and manage favorite locations.
Design Fare Splitting
Split ride costs between multiple passengers.
Design Scheduled Rides
Book rides in advance with guaranteed pickup.
Design Airport Queue System
FIFO queue for drivers at airports with rematch.
Design Corporate Travel Program
Business profiles with expense integration.
Design Address Autocomplete
Fast address suggestions with fuzzy matching.
Design Delivery Zone Management
Define and manage service areas with pricing.
Design Driver Document Management
Upload, verify, and track driver documents.
Design Delivery Instructions
Capture and display special delivery notes.
Design Tipping System
In-app tipping with suggested amounts.
Design Order Tracking UI
Real-time order status with map visualization.
Design Flight Search & Booking Engine
Search flights across airlines with caching, booking flow, and price alerts.
Design Hyperlocal Courier Delivery System
On-demand courier dispatch with real-time tracking and SLA management.
Design Train Ticketing & ETA System
Train seat reservation with segment-based inventory and real-time tracking.
Design a Toll Payment & Tracking System
Electronic toll collection with RFID, license plate recognition, and real-time payment processing.
Design a Drone Delivery Network
Autonomous drone delivery with flight path planning, airspace coordination, and fleet management.
Design an EV Charging Station Locator & Booking System
Find and book charging stations with real-time availability and multi-network aggregation.
Design a Corporate Fleet Management System
Vehicle tracking, driver management, ELD compliance, and maintenance scheduling for enterprise fleets.
Design a Cab-Sharing System for Daily Commute
Carpooling platform with route matching, cost splitting, and recurring schedules for commuters.
Design a Long-Distance Bus Ticketing Platform
Bus ticket booking with multi-operator aggregation, seat selection, and dynamic pricing.
Design a Smart Traffic Light Optimization System
Adaptive traffic signals with real-time optimization, corridor coordination, and emergency preemption.
Design an Incident/Accident Alert Network
Real-time traffic incident detection and alerting with multi-source fusion and geospatial targeting.
Design a Shared Autonomous Vehicle (Robotaxi) System
Design a robotaxi fleet: dispatch, ODD eligibility, telemetry ingest, remote-assist, and the safety-first architecture behind autonomous ride-hailing.
Design an EV Battery Swapping Network
Design a battery-swapping network: fungible pack inventory, state-of-health gating, two-sided swap allocation, reservations, and grid-aware charge scheduling.
Design a Cross-Border Ride-Sharing System
Design cross-border ride-sharing: jurisdiction rules engine, distance-split tax, whole-route driver eligibility, multi-currency settlement, and data residency.
Design a Ride-Demand Hotspot Analysis System
Design ride-demand hotspots: streaming H3 aggregation, short-horizon demand forecasting, supply-demand gaps, and convergent driver repositioning guidance.
Design a Drone Traffic Control System (UTM)
Design UTM for drones: 4D deconfliction, strategic plan approval, tactical conflict detection, dynamic geofencing, and federated airspace coordination.
Design a Fleet Vehicle Auction Platform
Design a wholesale car auction: real-time monotonic bidding engine, proxy bids, anti-sniping, condition grading, idempotent settlement, and title transfer.
Design a Real-Time Fuel Price Aggregator
Design a real-time fuel price aggregator: crowd + feed fusion, trust-weighted median scoring, freshness decay, anti-spam, and cheapest-near-me geo queries.
Design a Green Score for Routes
Design eco-routing: a deterministic per-segment emissions model, green-vs-fast scoring, an auditable version-pinned carbon ledger, and eco-scores.
Design an On-Demand Shuttle Service
Design pooled microtransit: dynamic dial-a-ride matching, virtual stops, the insertion heuristic, detour budgets, and batch matching for shared shuttle routing.
Design a Roadside Assistance Dispatch System
Design roadside assistance: capability-matched provider dispatch, offer-accept loop, coverage and claims, severity triage, and spike resilience.
Design a Smart (Keyless) Car Rental System
Design keyless car rental: overlap-free interval booking, offline-verifiable phone-as-key, revocation, telematics damage attribution, and dynamic pricing.
Design ChatGPT
Large language model serving with conversation management and streaming.
Design Voice Assistant
Always-on listening with wake word, NLU, and skills platform.
Design Metaverse Platform
3D virtual world with user presence and item ownership.
Design Autonomous Vehicle System
Self-driving with perception, planning, and control systems.
Design IoT Platform
Connect and manage millions of IoT devices with edge computing.
Design Smart Home Hub
Connect devices with automation rules and voice control.
Design AR Platform
Augmented reality with spatial mapping and object recognition.
Design VR Social Platform
Social VR with avatars, voice, and shared experiences.
Design Drone Delivery System
Autonomous drone deliveries with flight planning and safety.
Design Health Wearable Platform
Track vitals with alerts and health insights.
Design Edge Computing Platform
Deploy compute at the edge with orchestration and sync.
Design Satellite Internet
Global internet via satellite constellation with handoffs.
Design Brain-Computer Interface
Decode neural signals for control and communication.
Design Holographic Conference
Real-time 3D capture and rendering for remote presence.
Design Quantum Computing Service
Cloud access to quantum computers with job scheduling.
Design Robot Fleet Management
Coordinate autonomous robots with task assignment.
Design Digital Twin Platform
Virtual replicas of physical systems with simulation.
Design Smart Energy Grid
Manage distributed energy with demand balancing.
Design Space Mission Telemetry
Collect and process data from spacecraft.
Design Smart Agriculture Platform
Monitor crops with sensors and automate irrigation.
Design 3D Printing Network
Distributed manufacturing with job routing and quality.
Design AR Navigation
Overlay navigation on real-world camera feed.
Design VR Fitness Platform
Gamified workouts with motion tracking and multiplayer.
Design Drone Swarm Coordination
Coordinate multiple drones for shows or mapping.
Design Telehealth Platform
Remote consultations with video and health records.
Design Genomics Data Pipeline
Process and analyze genomic sequencing data.
Design Weather Prediction System
Ingest sensor data and run forecasting models.
Design Satellite Imagery Platform
Capture, process, and analyze earth observation data.
Design AR Virtual Try-On
Try clothes or glasses virtually with AR.
Design 5G Edge Computing
Ultra-low latency compute at 5G network edge.
Design Virtual Event Platform
Online conferences with networking and booths.
Design NFT Marketplace
Mint, buy, and sell digital collectibles.
Design Mobile Mesh Network
Peer-to-peer communication without infrastructure.
Design Smart City Platform
Integrate city services with IoT and analytics.
Design Passwordless Auth
Replace passwords with FIDO2 and biometrics.
Design Robot Service System
Automated service with order queue and coordination.
Design Deepfake Detection
Identify synthetic media with ML analysis.
Design AI Tutoring System
Personalized learning with adaptive curriculum.
Design Voice Cloning Platform
Clone voices with consent for personalized TTS.
Design Virtual Museum
3D exhibits with interactive tours.
Design Haptic Feedback System
Tactile feedback for VR and remote interaction.
Design Smart Mirror
Display information overlay on mirrors.
Design Gesture Control System
Control devices with hand gestures.
Design Sleep Tracking Platform
Monitor sleep patterns with insights and coaching.
Design Carbon Footprint Tracker
Calculate and offset carbon emissions.
Design Smart Glasses Platform
Lightweight AR glasses with notifications and camera.
Design Emotion Detection
Analyze facial expressions and voice for emotions.
Design Contact Tracing
Privacy-preserving exposure notification.
Design Autonomous Ship System
Self-navigating vessels with collision avoidance.
Design Vertical Farming System
Automated indoor farming with environment control.
Design Bitcoin
Decentralized payment network with proof-of-work consensus.
Design Ethereum
Smart contract platform with EVM and state management.
Design Crypto Exchange
Trading platform with order matching, custody, and compliance.
Design Crypto Wallet
Secure key management with multi-chain support.
Design DeFi Lending Protocol
Decentralized lending with collateralization and liquidation.
Design Blockchain Node
Full node with P2P networking and block validation.
Design Layer 2 Scaling
Rollups or sidechains for blockchain scalability.
Design Decentralized Exchange
AMM or order book DEX with liquidity pools.
Design Stablecoin
Price-stable cryptocurrency with collateral or algorithm.
Design Blockchain Indexer
Index and query blockchain data efficiently.
Design NFT Minting Platform
Create, mint, and manage NFT collections.
Design Institutional Custody
Secure storage with multi-sig and compliance.
Design DAO Governance
Decentralized voting and treasury management.
Design Blockchain Oracle
Bring off-chain data to smart contracts.
Design Cross-Chain Bridge
Transfer assets between different blockchains.
Design Staking Platform
Stake tokens with validator selection and rewards.
Design Gas Estimation
Predict transaction costs with network analysis.
Design Mempool Monitor
Track pending transactions and detect MEV.
Design Token Launchpad
IDO platform with vesting and fairness.
Design Yield Aggregator
Optimize DeFi yields across protocols.
Design NFT Royalty System
Enforce creator royalties on secondary sales.
Design Crypto Payment Gateway
Accept crypto payments for merchants.
Design Blockchain Explorer
Search and visualize blockchain data.
Design Smart Contract Auditing
Automated vulnerability detection in contracts.
Design Token Vesting
Time-locked token releases with schedules.
Design Fiat On-Ramp
Convert fiat to crypto with KYC and payments.
Design Multi-Signature Wallet
Require multiple approvals for transactions.
Design Flash Loan Protocol
Uncollateralized loans within single transaction.
Design NFT Gaming Platform
In-game assets as tradeable NFTs.
Design Token Bridge
Lock and mint tokens across chains.
Design Airdrop Distribution
Distribute tokens with eligibility and claiming.
Design NFT Auction System
Timed auctions with bidding and settlement.
Design Crypto Portfolio Tracker
Aggregate holdings across wallets and chains.
Design Crypto Tax Reporting
Calculate gains and generate tax reports.
Design NFT Drop Scheduler
Schedule and manage NFT collection launches.
Design Token Swap Aggregator
Find best swap rates across DEXs.
Design Proof of Reserves
Cryptographically prove asset holdings.
Design NFT Metadata Storage
Store and serve NFT metadata with IPFS.
Design On-Chain Voting
Transparent voting with delegation.
Design Crypto Price Alerts
Notify on price movements and whale activity.
Design Name Service
Human-readable addresses with resolution.
Design DeFi Insurance
Cover smart contract risks with claims.
Design Token Analytics
Track token metrics and holder distribution.
Design NFT Lending Protocol
Use NFTs as collateral for loans.
Design Perpetual Futures
Leveraged trading without expiry.
Design Crypto KYC System
Identity verification for compliance.
Design NFT Fractionalization
Split NFTs into tradeable tokens.
Design Liquidity Mining
Reward liquidity providers with tokens.
Design Blockchain RPC Service
Provide reliable blockchain API access.
Design ZK Proving System
Generate and verify zero-knowledge proofs.
Design Recommendation Engine
Personalized recommendations with collaborative filtering and content-based methods.
Design Search Ranking System
ML-based search ranking with relevance and personalization.
Design ML Platform
End-to-end ML lifecycle with training, serving, and monitoring.
Design Feature Store
Manage ML features with versioning, serving, and consistency.
Design Model Serving
Low-latency inference with auto-scaling and A/B testing.
Design ML Fraud Detection
Real-time fraud scoring with model updates and explainability.
Design LLM Serving
Serve large language models with optimization and caching.
Design Embedding Service
Generate and serve embeddings for search and similarity.
Design Vector Database
Store and query high-dimensional vectors efficiently.
Design ML Training Infrastructure
Distributed training with GPU clusters and checkpointing.
Design ML Content Moderation
Detect policy violations in text, images, and video.
Design NLP Pipeline
Text processing with NER, sentiment, and classification.
Design Image Recognition
Classify and tag images with deep learning.
Design Speech Recognition
Transcribe audio to text with accuracy and streaming.
Design Text-to-Speech
Generate natural speech from text with voice cloning.
Design OCR System
Extract text from images and documents.
Design ML Anomaly Detection
Detect unusual patterns with unsupervised learning.
Design Demand Forecasting
Predict demand with time series and external signals.
Design Dynamic Pricing ML
Optimize prices with demand elasticity and competition.
Design Churn Prediction
Predict customer churn with actionable insights.
Design Sentiment Analysis
Analyze text sentiment with nuance and context.
Design AI Chatbot
Conversational AI with intent and entity extraction.
Design Image Generation
Generate images from text with diffusion models.
Design Object Detection
Detect and localize objects in images and video.
Design Face Recognition
Identify faces with accuracy and privacy controls.
Design Document Understanding
Extract structured data from unstructured documents.
Design RAG System
Retrieval-augmented generation for knowledge QA.
Design ML A/B Testing
Optimize experiments with multi-armed bandits.
Design Model Monitoring
Detect drift and degradation in production.
Design Model Registry
Version and manage ML models with metadata.
Design AutoML Platform
Automated model selection and hyperparameter tuning.
Design Data Labeling Platform
Manage annotation with quality control.
Design Experiment Tracking
Track ML experiments with metrics and artifacts.
Design Data Augmentation
Generate synthetic training data for ML.
Design ML Pipeline Orchestration
Orchestrate training and deployment pipelines.
Design GPU Scheduling
Manage GPU resources for ML workloads.
Design Model Compression
Quantization and pruning for efficient inference.
Design Edge ML Inference
Run ML models on edge devices.
Design Online Learning System
Continuously update models with streaming data.
Design ML Explainability
Interpret and explain model predictions.
Design ML Fairness System
Detect and mitigate bias in ML models.
Design Active Learning
Intelligently select samples for labeling.
Design Federated Learning
Train models across distributed data sources.
Design Video Analysis Pipeline
Process and analyze video content at scale.
Design Semantic Search
Search by meaning with embeddings.
Design LLM Fine-Tuning Platform
Fine-tune large language models efficiently.
Design Prompt Management
Version and optimize prompts for LLMs.
Design ML Cost Optimization
Optimize ML infrastructure costs.
Design Knowledge Graph
Build and query entity relationships.
Design Multimodal AI System
Process text, images, and audio together.