Full-Stack Developer | Next.js, TypeScript, Supabase | Production AI Integration
I build and ship complete web applications on my own, including the parts that only matter after launch: authentication, access control, rate limiting, and API cost management.
Most recently I designed, built, and deployed a production AI application end to end. It is live, with users across 14+ countries. I handled architecture, backend, frontend, database, security, and deployment myself.
What that application includes:
- Server-side identity verification from access tokens; client-supplied user IDs are never trusted
- Three-layer persistent memory system with importance ranking
- Rate limiting implemented as a Postgres function, scoped per user and per IP
- Row-level security across all user data
- Prompt caching to cut recurring API costs
- Streaming responses over Server-Sent Events
- Full analytics instrumentation
I also publish technical writing about this work: -----------/blog/hardening-ai-chat-api
MY STACK
Next.js, React, TypeScript, Node.js, PostgreSQL, Supabase (RLS, RPC), Anthropic Claude API, Vercel, Cloudflare, Git, PostHog
WHAT I CAN DO FOR YOU
- Build web applications from scratch, front to back
- Add AI features to an existing product properly, with security and cost controls, not a fragile demo
- Authentication, permissions, and security hardening
- Backend, database design, and API integrations
- Fix, maintain, and extend existing codebases
HOW I WORK
I work night hours in the Philippines, which puts me online through US and European business days. Async-first: I document what I am doing, ship in small increments, and flag blockers early rather than going quiet.
AVAILABILITY
Available immediately. Full-time preferred. Open to long-term roles.
