Thomas G Henry

Design and deliver full-stack, mobile, and AI-powered applications for clients, taking ownership of architecture, integrations, security, and production deployment.

• Built a multimodal AI study platform supporting document and media uploads, generated quizzes, automated grading, and personalized feedback using React and the Vercel AI SDK.
• Developed a multi-tenant Flutter/Firebase RAG application for government compliance documents, with account-scoped authorization and isolated customer vector stores.
• Implemented OAuth 2.0 authentication, Stripe-backed access control, and API proxying for OpenAI Custom GPT products.
• Recovered a production Supabase/PostgreSQL database after a problematic schema change and implemented tenant isolation using row-level security, least-privilege access, and automated security tests.
• Integrated Plaid into an SMS-based personal finance assistant for transaction tracking and account inquiries.
• Delivered a React Native tourism marketplace to the Apple App Store and Google Play using AWS and MongoDB.

Technologies: TypeScript, React, React Native, Flutter, Firebase, PostgreSQL, Supabase, OpenAI, RAG, Stripe, Plaid, AWS, Vercel

Served as the sole full-time engineer responsible for an inherited social-events platform, owning backend modernization, product development, and production reliability during growth from a few hundred to nearly 10,000 users.

• Improved primary events API latency by 10× at p50 and 7× at p95 through optimized Firestore queries, parallel data fetching, and elimination of N+1 access patterns.
• Built Stripe checkout, refunds, subscriptions, promotional pricing, and abandoned-checkout recovery, including RevenueCat integration.
• Developed onboarding and engagement workflows using Twilio SMS, OneSignal push notifications, Firebase, and React.
• Modernized Node.js/Express services with TypeScript, modular architecture, automated regression testing, and CI quality gates.
• Built auditable Firestore migration tooling, contextual incident alerts, and operational kill switches for 10+ external service integrations.
• Used Claude Code and Devin across 60+ feature tickets, establishing reusable agent instructions, project knowledge, and code-quality rules to maintain architectural consistency.
• Delivered a React-based acquisition funnel with Firebase authentication, Stripe Checkout, deep linking, and automated Vercel deployments.

Technologies: TypeScript, Node.js, Express, React, Next.js, Firebase, Firestore, Stripe, Twilio, OneSignal, Jest, Playwright, GitHub Actions, Vercel

Developed and maintained the Teaching Assignment Management System, supporting clinical placement matching, faculty research, and administrative workflows.

• Built and maintained application features using React, TypeScript, Node.js, MySQL, and AWS.
• Modernized frontend code from Flow to TypeScript to improve maintainability and development consistency.
• Introduced automated testing with Jest and Cypress to strengthen regression coverage.
• Implemented Terraform infrastructure as code and CI quality gates to improve deployment reliability.
• Supported ongoing application development and maintenance for institutional users.

Technologies: React, TypeScript, Node.js, MySQL, AWS, Jest, Cypress, Terraform, CI/CD