Sam Okafor
Full-Stack Software Engineer
Seattle, WA | sam.okafor@example.com | portfolio at example.com
Professional summary
Full-stack software engineer with 5+ years of experience building scalable web applications using TypeScript, React, and Node.js. Known for writing clean, maintainable code, leading feature delivery from design through deployment, and reducing production incidents through comprehensive testing and CI/CD practices.
Experience
Software Engineer
B2B software company (Series B, 90 engineers) · Seattle, WA · 2022 to Present
- Designed and deployed a real-time notification system serving 50K+ daily active users, reducing missed event rates by 35%.
- Refactored legacy monolith into 12 microservices, cutting average deploy time from 45 minutes to 8 minutes and improving fault isolation.
- Mentored 3 junior engineers on code review standards, testing practices, and Git workflows, accelerating their first production deployments.
- Led adoption of TypeScript across 4 services, reducing type-related bugs by 60% within the first quarter.
Software Engineer
Logistics technology company · Seattle, WA · 2020 to 2022
- Built a carrier rate API in Node.js and PostgreSQL that served 400 requests per second at 120 ms p95.
- Replaced nightly batch syncing with an event queue and cut data staleness from 12 hours to under two minutes.
- Raised backend test coverage from 41% to 78% and added contract tests that caught nine breaking changes before release.
- Owned on-call for two services and reduced paging volume by 45% by fixing the three noisiest alert rules.
Junior Developer
Digital product agency · Portland, OR · 2019 to 2020
- Shipped 14 client features in React and TypeScript across five codebases in one year.
- Reduced first-load JavaScript on a marketing site by 38% through route-level code splitting.
- Wrote the team's component documentation, which cut repeat onboarding questions from new contractors.
- Fixed 60 accessibility defects found in an audit, including focus order and form labelling.
Education
- B.S. Computer Science | State university | 2019
Certifications
- AWS Certified Developer, Associate | 2023
Skills
JavaScript/TypeScript · React · Node.js · SQL/NoSQL databases · REST & GraphQL APIs · CI/CD pipelines · Git/Version control · System design