Daniel Okafor
Software Developer, Backend and APIs
[email protected] | (512) 555-0142 | Austin, TX | github.com/dokafor-dev
Summary
Software developer with 5 years building backend services and APIs in TypeScript and Go. Cut p95 API latency by 48% at a payments startup and led the move from a monolith to six services without downtime. Comfortable owning a feature from design doc to on-call.
Technical Skills
- Languages: TypeScript, Go, Python, SQL
- Backend: Node.js, REST, gRPC, Kafka, PostgreSQL, Redis
- Cloud and tooling: AWS (ECS, Lambda, RDS), Docker, Terraform, GitHub Actions, Datadog
Professional Experience
- Rebuilt the card authorization API in Go, cutting p95 latency from 410 ms to 210 ms across 3M daily requests.
- Led the split of a Node.js monolith into 6 services behind an API gateway, shipped in 4 phases with zero customer-facing downtime.
- Added contract tests and a staging replay of production traffic, which cut release rollbacks from 9 to 2 per quarter.
- Mentored 3 junior developers through code review and paired on-call; two now own services of their own.
- Built a patient scheduling API in TypeScript and PostgreSQL used by 140 clinics, with 99.95% uptime over 2 years.
- Replaced nightly batch syncs with event-driven updates on Kafka, so appointment changes reached partner systems in under 5 seconds.
- Wrote the team's first load tests in k6, which found a connection-pool limit before a 3x traffic launch.
- Cut average API response time 35% by adding Redis caching to the 5 most-called endpoints.
- Built a Python CLI that set up test environments in 5 minutes instead of 40; the team still uses it.
- Fixed 25 bugs in a React admin app and added tests that raised its coverage from 41% to 63%.
- Wrote Jest integration tests for the billing service that caught 3 regressions before release.
- Shipped 12 pull requests to production through code review with senior engineers.
Education
Certifications
- AWS Certified Developer, Associate