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Nadia Okafor

Senior Software Engineer

nadia@okafor.dev+1 347 555 0182okafor.devBrooklyn, New York

Profile

Backend engineer specialising in high-throughput transaction systems. I lead the design of ledgers, settlement pipelines and the migrations that move them without downtime. Most of my work lives in the gap between correctness and latency — exactly-once semantics under load, and the observability needed to prove it.

Experience

2022 — PresentNew York, NY

Senior Software Engineer · Verdantly

•Rebuilt the settlement engine around an append-only ledger, cutting end-of-day reconciliation from 6 hours to 11 minutes and eliminating a class of balance-drift incidents entirely.
•Led a live migration of 900M rows from Postgres to a sharded topology with zero downtime and no read-path regression, using a dual-write and shadow-verify rollout over nine weeks.
•Set the service-level objectives and error budget policy now used by eleven teams; on-call pages fell 64% in two quarters.
•Mentored four engineers to mid and senior level; two now own services outright.

Go  ·  Postgres  ·  Kafka  ·  Kubernetes  ·  OpenTelemetry

2019 — 2022Remote

Software Engineer · Halcyon Labs

•Designed the exactly-once ingestion path that carried 2.4M events per second at peak with a p99 of 40ms.
•Open-sourced the schema-evolution tooling built for it; 3.1k stars and adopted by six companies outside Halcyon.
•Cut cloud spend $1.8M annually by replacing a managed pipeline with a self-hosted consumer group and tiered storage.

Rust  ·  Kafka  ·  Flink  ·  Terraform

2017 — 2019Newark, NJ

Software Engineer · Northbound Systems

•Shipped the CI cache layer that took median build time from 22 minutes to 7.
•Wrote the incident-review practice the company still runs; 140 reviews completed to date.

Python  ·  Bazel  ·  AWS

Selected Projects

2021 — Present

Tessera · github.com/nokafor/tessera

Schema-evolution toolkit for Avro and Protobuf streams. 3.1k stars, 40+ contributors.

2023

Slowhand · github.com/nokafor/slowhand

Deterministic fault-injection proxy for gRPC. Used in production chaos drills at three companies.

2024

Ledgerbook · okafor.dev/ledgerbook

A short field guide to double-entry systems for engineers. 18k readers.

Skills

LanguagesGo, Rust, Python, SQL, TypeScript

SystemsKafka, Postgres, Flink, Redis, gRPC

InfrastructureKubernetes, Terraform, AWS, Bazel

PracticeDistributed tracing, Incident review, Technical writing, Mentoring

Education

2013 — 2017New Brunswick, NJ

Rutgers University · B.S. Computer Science

Minor in Mathematics · Highest Honors · GPA 3.9

2018New York, NY

Recurse Center · Resident

Summer 2 batch — compilers and type systems

Speaking

Exactly Once, EventuallyStrange Loop2023

Migrating a Ledger in DaylightQCon New York2024

The Error Budget Nobody ReadsSREcon Americas2025

Nadia Okafor

Senior Software Engineer

nadia@okafor.dev+1 347 555 0182okafor.devBrooklyn, New York

01Profile

02Experience

2022 — PresentNew York, NY

Senior Software Engineer · Verdantly

—Rebuilt the settlement engine around an append-only ledger, cutting end-of-day reconciliation from 6 hours to 11 minutes and eliminating a class of balance-drift incidents entirely.
—Led a live migration of 900M rows from Postgres to a sharded topology with zero downtime and no read-path regression, using a dual-write and shadow-verify rollout over nine weeks.
—Set the service-level objectives and error budget policy now used by eleven teams; on-call pages fell 64% in two quarters.
—Mentored four engineers to mid and senior level; two now own services outright.

Go  ·  Postgres  ·  Kafka  ·  Kubernetes  ·  OpenTelemetry

2019 — 2022Remote

Software Engineer · Halcyon Labs

—Designed the exactly-once ingestion path that carried 2.4M events per second at peak with a p99 of 40ms.
—Open-sourced the schema-evolution tooling built for it; 3.1k stars and adopted by six companies outside Halcyon.
—Cut cloud spend $1.8M annually by replacing a managed pipeline with a self-hosted consumer group and tiered storage.

Rust  ·  Kafka  ·  Flink  ·  Terraform

2017 — 2019Newark, NJ

Software Engineer · Northbound Systems

—Shipped the CI cache layer that took median build time from 22 minutes to 7.
—Wrote the incident-review practice the company still runs; 140 reviews completed to date.

Python  ·  Bazel  ·  AWS

03Selected Projects

2021 — Present

Tessera · github.com/nokafor/tessera

Schema-evolution toolkit for Avro and Protobuf streams. 3.1k stars, 40+ contributors.

2023

Slowhand · github.com/nokafor/slowhand

Deterministic fault-injection proxy for gRPC. Used in production chaos drills at three companies.

2024

Ledgerbook · okafor.dev/ledgerbook

A short field guide to double-entry systems for engineers. 18k readers.

04Skills

Distributed systems

Postgres

Rust

Kubernetes

05Education

2013 — 2017New Brunswick, NJ

Rutgers University · B.S. Computer Science

Minor in Mathematics · Highest Honors · GPA 3.9

2018New York, NY

Recurse Center · Resident

Summer 2 batch — compilers and type systems

06Speaking

Exactly Once, EventuallyStrange Loop2023

Migrating a Ledger in DaylightQCon New York2024

The Error Budget Nobody ReadsSREcon Americas2025

Nadia Okafor

Senior Software Engineer

nadia@okafor.dev+1 347 555 0182okafor.devBrooklyn, New York

Profile

Experience

2022 — PresentNew York, NY

Senior Software Engineer · Verdantly

▪Rebuilt the settlement engine around an append-only ledger, cutting end-of-day reconciliation from 6 hours to 11 minutes and eliminating a class of balance-drift incidents entirely.
▪Led a live migration of 900M rows from Postgres to a sharded topology with zero downtime and no read-path regression, using a dual-write and shadow-verify rollout over nine weeks.
▪Set the service-level objectives and error budget policy now used by eleven teams; on-call pages fell 64% in two quarters.
▪Mentored four engineers to mid and senior level; two now own services outright.

Go  ·  Postgres  ·  Kafka  ·  Kubernetes  ·  OpenTelemetry

2019 — 2022Remote

Software Engineer · Halcyon Labs

▪Designed the exactly-once ingestion path that carried 2.4M events per second at peak with a p99 of 40ms.
▪Open-sourced the schema-evolution tooling built for it; 3.1k stars and adopted by six companies outside Halcyon.
▪Cut cloud spend $1.8M annually by replacing a managed pipeline with a self-hosted consumer group and tiered storage.

Rust  ·  Kafka  ·  Flink  ·  Terraform

2017 — 2019Newark, NJ

Software Engineer · Northbound Systems

▪Shipped the CI cache layer that took median build time from 22 minutes to 7.
▪Wrote the incident-review practice the company still runs; 140 reviews completed to date.

Python  ·  Bazel  ·  AWS

Selected Projects

2021 — Present

Tessera · github.com/nokafor/tessera

Schema-evolution toolkit for Avro and Protobuf streams. 3.1k stars, 40+ contributors.

2023

Slowhand · github.com/nokafor/slowhand

Deterministic fault-injection proxy for gRPC. Used in production chaos drills at three companies.

2024

Ledgerbook · okafor.dev/ledgerbook

A short field guide to double-entry systems for engineers. 18k readers.

Skills

GoRustPythonSQLTypeScriptKafkaPostgresFlinkRedisgRPCKubernetesTerraformAWSBazelDistributed tracingIncident reviewTechnical writingMentoring

Education

2013 — 2017New Brunswick, NJ

Rutgers University · B.S. Computer Science

Minor in Mathematics · Highest Honors · GPA 3.9

2018New York, NY

Recurse Center · Resident

Summer 2 batch — compilers and type systems

Speaking

Exactly Once, EventuallyStrange Loop2023

Migrating a Ledger in DaylightQCon New York2024

The Error Budget Nobody ReadsSREcon Americas2025

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Included: Fine-tune Résumé AI12 cr
Included: Interview Prediction AI24 cr
Included: Evaluator AI24 cr
Included: Promotion AI24 cr
Included: Offer Negotiation AI24 cr
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