Full-Stack Developer — Productionize an AI-Guided Wellness Platform (React, Anthropic API, Netlify)

Overview I'm the founder of Nafas, an AI-guided integrative wellness platform. A working prototype already exists and is deployed: a React single-page app (currently compiled from JSX via Babel into a single HTML file) that runs a conversational intake, generates a personalised 8-session course via the Anthropic API, and delivers live guided sessions with an interactive visual interface. API calls are routed through a Netlify serverless function with the key stored server-side. I'm not looking for someone to design or build from scratch. I'm looking for a developer to take this prototype to a production-ready v1 that real paying clients can use. Scope of work (v1) User accounts and authentication (email-based is fine) Database layer so each client's intake, generated course, session transcripts, and progress persist across sessions and devices (Supabase, Firebase, or similar — open to your recommendation) Payment integration (Stripe) for a single product: the 8-session course Migrate the single-file build to a proper project structure with a build pipeline, while preserving the existing UI, animations, and design system Harden the serverless API proxy (rate limiting, error handling, basic abuse protection) Fully responsive mobile experience (the app is desktop-first today; a mobile rebuild is partially done) Basic admin view for me to see client progress and feedback Out of scope for v1 (planned for later phases): facilitator directory, community features, video library, e-store, subscription tiers. What I provide Complete prototype source code and the live deployed site All system prompts, course-generation logic, and content architecture (shared under NDA — the underlying framework is proprietary IP) Design tokens, fonts, and visual direction — the aesthetic is established and non-negotiable Fast decisions. I'm hands-on, technically literate, and iterate quickly. You're a fit if Strong React + Node/serverless experience (Netlify Functions or similar) You've built with LLM APIs before — ideally the Anthropic API — and understand token limits, streaming, structured JSON outputs, and prompt/response handling in production Experience with auth + Stripe + a managed database in shipped products You communicate clearly and can propose architecture, not just execute tickets Structure Fixed-price, milestone-based. Please include in your proposal: (1) your recommended stack for auth/database, (2) a rough milestone breakdown with estimates, (3) one relevant shipped project, ideally involving an LLM API. See preliminary links below for reference: https://host-html-user.com/p/8461tf https://claude.ai/public/artifacts/333df7b1-b094-4521-b8a2-30e2bd51349f