React Native / Expo developer — AI-powered iOS & Android app (Supabase + Anthropic API)

I'm building a mobile app with a specific mathematical structure at its core. A fully functional browser-based prototype already exists containing the complete AI logic and UI behaviour. You are building a native mobile container for a system that already works. The stack: React Native / Expo, Supabase, Anthropic Claude API, RevenueCat, Expo Push Notifications. Core screens (MVP): dashboard, conversational AI chat interface with structured response parsing, action history, settings with subscription and notification management. A complete technical brief is ready to share under NDA. The NDA is required before the brief — this is standard and non-negotiable. Payment across four milestones, all through Upwork. To apply, please confirm: You have shipped a React Native / Expo app to the App Store You have integrated a third-party AI API in a production app You are comfortable with Supabase and RevenueCat You are happy to sign an NDA before receiving the brief Your estimated timeline from start to working device prototype. NO AGENCIES or people acting on behalf of agencies.