Chamuditha Prabhath J.

I build and ship production React Native apps — and the full backend and AI systems behind them. My flagship app, NotePal, is live on Google Play: an AI study tool that turns audio, PDFs, YouTube links, and text into notes, quizzes, and flashcards. One FastAPI backend powers both the React Native mobile app and the web app, with cross-platform subscriptions handled through RevenueCat (mobile) and Stripe (web). It's a real, monetized product in a store — not a demo. That's the difference I bring: I don't just build the screens, I ship the whole thing — store submission, in-app purchases, billing webhooks, and the scalable backend that keeps it running cheaply at volume. What I build: - Cross-platform mobile apps (React Native — Android & iOS), including store submission and in-app purchases (RevenueCat) - AI-powered apps (OpenAI, Claude, RAG pipelines, vector search with Pinecone) - SaaS platforms — multi-tenant architecture, auth, billing, dashboards - Full-stack web apps (Next.js, React, TypeScript, FastAPI, Node.js) - Backend & cloud infrastructure (AWS Lambda, SQS, Fargate, Docker, CI/CD) Recent work: - Built NotePal end-to-end — React Native app + web + AI backend — offloading heavy work (PDF/YouTube/long-audio processing) to serverless Lambdas to keep cloud costs low - Built GeoScraper, a B2B SaaS with a credit-based billing engine handling concurrent, race-condition-safe transactions - Lead full-stack development and DevOps on a HIPAA-compliant healthcare platform — encryption, RBAC, audit logging, CI/CD, and production reliability I'm a strong fit if you're: - Launching a mobile app and need it built, monetized, and shipped to the stores - Building an AI or SaaS product and want it production-ready, not a fragile prototype - Scaling an existing app without a costly rewrite Send me a message with what you're building. I'll reply with an honest technical assessment and the fastest path to shipping it.