React-Native Developer - Apple HealthKit required

we are a consumer health app that reads your Apple Watch data every morning — HRV, sleep quality, steps, active energy — and delivers a spoken, AI-generated daily plan. Built on React Native, Supabase, and Anthropic's Claude AI. We are looking for a contract React Native developer to build V1 from specification to TestFlight. The product is fully designed, the tech stack is chosen, the legal entities are formed, and seed funding is in place. This is a build-it role, not a discovery role. What you're walking into: A founder with a complete product specification, a defined tech stack, milestone-based payment, a signed contractor agreement (NDA + IP assignment), and a clear 90- day path to TestFlight beta with real users. You will need At least one live app in the App Store built with React Native — link required in application ✦ Demonstrable experience with Apple HealthKit — must have integrated at least one HealthKit data type in a shipped app ✦ Backend integration experience — Supabase, Firebase, or comparable cloud backend with auth and real-time data ✦ Third-party API integration — REST APIs with OAuth or API key authentication ✦ Willingness to sign a standard contractor NDA and IP assignment agreement before engagement begins