Senior Full-Stack Developer Needed for Mobile App & Website (React Native + Web) - Contract to Hire

I'm looking for an experienced full-stack developer (or small team) to take over development of a modern productivity/lifestyle application. A prototype has already been started, including authentication, initial UI, and core architecture. I'm looking for someone who can refine what's already been built and take the product to a production-ready release. The project includes both: Native mobile app (React Native / Expo) Marketing website This is not a simple landing page or CRUD application. A strong eye for clean UI/UX and polished user experiences is just as important as solid engineering. What You'll Be Building The application already has the design direction established. You'll be responsible for helping build and polish features such as: User authentication Personalized dashboard Data capture workflows AI-assisted features Search and retrieval User profiles Responsive marketing website Production deployment Additional features will be introduced throughout development. Looking For Someone who has experience with: React Native Expo TypeScript Responsive web development Supabase (or similar backend) Authentication API integrations Bonus: AI applications Mobile app publishing Strong UI implementation Product thinking Deliverables Production-ready mobile application Production-ready website Responsive UI Clean, maintainable code Deployment assistance App Store & Google Play preparation