Design Haptic Feedback System - System Design | WinJob

Haptic platform problem framing and actuator abstraction model

A cross-platform haptic feedback platform lets product teams author tactile patterns once and ship them to phones, VR controllers, wearables, and in-vehicle surfaces. Meta Quest SDKs, HaptX exoskeleton channels, and Ultraleap mid-air ultrasound all need a normalized effect contract with per-device calibration, not bespoke firmware per title.

Numbers to state early

Registered apps: 180K titles
Peak command rate: 4.2M cmd/s
Actuator families: ERM, LRA, piezo, ultrasonic

Failure and edge cases

Treating every actuator as a simple on/off rumble hides frequency response curves—always model DeviceProfile with max acceleration, resonant band, and thermal duty-cycle caps.

Java

javaOne Dark Pro

1 public enum ActuatorFamily { ERM, LRA, PIEZO, ULTRASONIC, FORCE_FEEDBACK }
2  
3 public record DeviceProfile(String id, ActuatorFamily family, int maxFreqHz, float dutyCycleCap) {}

Python

pythonOne Dark Pro

1 class ActuatorFamily(Enum):
2     ERM = "erm"
3     LRA = "lra"
4     PIEZO = "piezo"
5     ULTRASONIC = "ultrasonic"
6     FORCE_FEEDBACK = "force_feedback"

TypeScript

typescriptOne Dark Pro

1 export type ActuatorFamily = "erm" | "lra" | "piezo" | "ultrasonic" | "force_feedback";
2  
3 export interface DeviceProfile {
4   id: string;
5   family: ActuatorFamily;
6   maxFreqHz: number;
7   dutyCycleCap: number;
8 }

Why interviewers care

Haptic Feedback System interviews reward crisp scope, explicit trade-offs, and failure stories—not generic microservice diagrams.

Interview checkpoint

Name one failure story for Haptic platform problem framing and actuator abstraction model that proves you understand real outages, not happy-path diagrams.

Key Highlights

•180K titles
•Game/VR Client -> Haptic SDK -> Effect Runtime
•A cross-platform haptic feedback platform lets product teams author tactile patterns once

1	public enum ActuatorFamily { ERM, LRA, PIEZO, ULTRASONIC, FORCE_FEEDBACK }
2
3	public record DeviceProfile(String id, ActuatorFamily family, int maxFreqHz, float dutyCycleCap) {}

1	class ActuatorFamily(Enum):
2	ERM = "erm"
3	LRA = "lra"
4	PIEZO = "piezo"
5	ULTRASONIC = "ultrasonic"
6	FORCE_FEEDBACK = "force_feedback"

1	export type ActuatorFamily = "erm" \| "lra" \| "piezo" \| "ultrasonic" \| "force_feedback";
2
3	export interface DeviceProfile {
4	id: string;
5	family: ActuatorFamily;
6	maxFreqHz: number;
7	dutyCycleCap: number;
8	}