I already have a partially built React Native project and a hard 3-day deadline to get it ready for both iOS and Android stores. The UI is largely there; what’s missing is rock-solid user authentication and fully functional push notifications. Here’s the current state: • Code lives in a private GitHub repo (React Native 0.72, TypeScript). • Screens are styled but not yet wired to backend endpoints. • Firebase is provisioned; keys will be shared on kickoff. Your task is to jump in immediately, implement secure email/password auth (Firebase Auth), set up cross-platform push notifications (FCM + APNs), connect the remaining API calls, and run the project through final device testing. I’ll handle design feedback in real time so you can focus on code. Deliverables I need in hand at the 72-hour mark: 1. Updated repository with clean, commented code. 2. Working auth flow (sign-up, login, logout, token refresh). 3. Push notifications received on both iOS TestFlight and a production Android build. 4. Signed builds or clear instructions for App Store / Play Console submission. 5. Brief README outlining environment setup and any config steps. I’ll stay available on Slack and will merge pull requests promptly so nothing stalls. If you’re comfortable moving fast with React Native, Firebase, and native notification setup, let’s get this over the finish line.