Personal details
Thomas H.
Technical skills
About
Senior full-stack engineer who helps teams stabilize, extend, and ship TypeScript products without creating a maintenance trap. I bring 15+ years across IBM, Duke University School of Nursing, and early-stage startups.
I work across React, Next.js, Node.js, Firebase/PostgreSQL, Vercel/AWS, and integrations including OpenAI and Stripe. Recent work includes modernizing an inherited Node.js API with TypeScript, building Next.js administration workflows, establishing Playwright and Schemathesis coverage in CI, developing multimodal AI products, and shipping Flutter/Firebase and React Native applications.
Best fit: teams that need a senior individual contributor to take ownership of an ambiguous system, introduce appropriate engineering guardrails, and deliver maintainable features.
Work Experience
- Modernized an inherited Node.js API with TypeScript and CI quality gates while delivering Next.js administration workflows and OpenAI, Stripe, Mailchimp, and Slack integrations.
- Established Playwright API test suite with Schemathesis fuzz testing in CI, validated against the live Firebase backend
- Designed/operated AI-assisted delivery workflows, including reusable engineering skills and a project knowledge base for feature development and debugging
- Built multimodal AI study tool: rich media and document upload, OpenAI-generated quizzes, AI-graded responses with per-answer coaching (React, Vercel AI SDK, Vercel)
- Built Flutter/Firebase RAG system over government compliance documents and SOPs, multi-tenant
- Built authentication and Stripe paywall middleware for OpenAI Custom GPT products (OAuth-level auth)
- Integrated Plaid into SMS chatbot for personal finance tracking (spending queries, account balance)
- Published tourism gig marketplace to iOS and Android App Stores (React Native, AWS, MongoDB)