Senior Full Stack Software Engineer

Led development for Butterflies, a social network with AI characters, and Liftango, an on-demand shared transit platform. Built full-stack features using Next.js, TypeScript, NestJS, PostgreSQL, and Supabase.

Built a shared Node.js service integrating OpenAI, Claude, and Gemini with streamed responses, provider fallback, Zod validation, caching, rate limiting, and BullMQ background queues. Reduced LLM costs by approximately 30%.

Developed AI agents using tool calling against REST and GraphQL APIs, and wrote MCP servers for internal-tool access. Integrated Stripe, Twilio, Firebase push notifications, Auth0, Docker, GitHub Actions, AWS, and Vercel. Built 3D configurators using Three.js and BabylonJS, and helped the team improve delivery speed through Cursor, Claude Code, and GitHub Copilot.

Worked remotely on WhatsApp Web, focusing on message rendering and global search for a product serving more than two billion users. Used React, Relay, and GraphQL to build user-facing experiences.

Built onboarding flows for the WhatsApp Business API and internal privacy review tools, covering React interfaces, GraphQL mutations, and Hack endpoints. Ensured work met GDPR and DMA review requirements.

Reduced WhatsApp Web initial bundle size by about 20% through code splitting, lazy loading, and optimized Relay queries. Introduced React Testing Library to Ads billing code, increasing coverage from 15% to more than 90%, and mentored engineers through code reviews and React/GraphQL guidance.

Rebuilt a legacy PHP and WordPress fishing map using React and Preact, improving performance by approximately 170%. Developed a Node.js and Express backend with REST and GraphQL services backed by PostgreSQL.

Integrated scheduled NOAA tide, weather, and Google Maps data ingestion with Redis caching. Built the Smart Fishing Spots React Native application with map layers and Firebase push alerts, growing it to more than 50,000 users.

Implemented Stripe membership billing and webhooks for renewals, upgrades, and failed payments. Redesigned the community portal, added Typesense search, improved signups by 125%, increased search-to-action conversion by 45%, and reduced mobile data usage through SWR caching and GraphQL fragments.