React Native / Expo Engineer — 1-Month Ship Sprint (AI-Native)

What this is: We're a fast-moving consumer app studio shipping multiple subscription apps. I need an extra senior pair of hands for one month to push our build velocity hard. If you live in Cursor / Claude Code and ship clean RN/Expo features in hours — not days — keep reading. What you'll do Build and ship features across our mobile app(s) end-to-end — UI, data, and the Supabase/Fastify glue behind them Move fast without breaking the funnel: onboarding, paywall, scan flows, push, etc. Own tickets from spec to merged PR with minimal hand-holding Our stack (you should be strong in most of this) Monorepo: pnpm workspaces, TypeScript Mobile: React Native 0.85 / React 19, Expo SDK 56 (dev client), expo-router, TanStack Query v5, Reanimated, react-native-vision-camera, expo-notifications Backend: Node + Fastify 5 (TypeScript) AI: OpenAI GPT-4.1 Data/Auth: Supabase — Postgres (RLS), Auth (Apple/Google/email), Storage (photos) Payments: Stripe (app-to-web) + Superwall paywall Push: Expo Push (APNs), timezone-aware crons Hosting: Railway (API + cron) You're a fit if You're genuinely AI-native - Cursor, Claude Code, Copilot, whatever - and it makes you 3–5× faster, not just fancy autocomplete You've shipped real RN/Expo apps to the App Store / Play Store (links required) You know Supabase RLS and TanStack Query cold, without googling the basics You communicate clearly in English and don't go dark You can start tomorrow and commit full-time for the whole month — this is your main thing for the next 4 weeks Bonus points Superwall / Stripe subscription experience vision-camera or AI image / on-device flows You've worked solo-ish inside a startup and can make sensible product calls on your own The deal Length: ~4 weeks, starting June 23–24, wrapping July 22–23 Budget: up to $2,000 for the month Hours: Full-time (~40 hrs/week) Timezone: Asian Timezone. To apply Start your proposal by linking the RN/Expo app you're proudest of, and tell me in one or two sentences the fastest thing you've ever shipped with AI tools. Put the word "kabocha" at the very top so I know you actually read this — proposals without it get skipped.