Full Stack Engineer (React Native/Node.js)

We are looking for AI-native Full Stack Engineer (React Native/Node.js). We have a live mobile product in the polish/ beta/store-release phase. The scaffolding exists. The work is: make the existing app correct, match design, keep the AI coach reliable, and ship through TestFlight and Google Play. You will work across React Native(Expo) and Node(NestJS). You will also touch the AI coach from the client and API-contract side (strict request bodies, server-owned conversation history, entitlements gating access). A separate Python service exists behind that coach; being able to open it and land a small fix is a plus, not a requirement. We want people who have inherited a messy production app and improved it. How we hire We send a short build task (hard cap 4 hours). You record a Loom of how you actually work. If that looks right, we do one 30-minute call about your Loom and your repo. That is the whole process.