What separates junior devs from senior devs isn’t just writing code — it’s designing systems that scale, stay simple for users, and stay rock solid under the hood. In this video, I build a full-stack, six-screen Food Delivery app in React Native that’s not just “pretty UI”, but actually production-minded: real auth, real state, real database thinking, and real monitoring. We go beyond half-baked clones and build like product engineers. I kick things off with Expo so you can move fast without living inside Xcode or Android Studio, then I style the entire app with NativeWind (Tailwind-style utility classes in React Native). I show you how to set up fonts, assets, and a clean constants layer so your UI stays consistent and reusable. From there we build core app flows: email/password auth, tab + stack navigation, a home screen with offers, a search screen with name/category filtering, a profile screen, and a production-style cart store with add-ons using Zustand. Finally, we wire up a scalable backend with Appwrite for auth, database, and file storage — and I add Sentry for crash tracking and monitoring so you can ship bug-free code with confidence.