I fully owned a production React Native (Expo) mobile app combining a TikTok-style video feed with in-app crypto trading and an embedded wallet. I shipped and maintained the entire client surface end-to-end and released to both iOS App Store and Google Play, with 100+ users in production. (App name omitted; can share privately.)

The product blended two high-friction domains in one mobile app:

Short-form video (feed, engagement, creation)

Crypto trading + wallets (quotes, holdings, transactions)

Backend APIs and smart contracts evolved in parallel, so the mobile app had to remain stable, defensive, and releasable under change.

App architecture & navigation: Expo Router with a modular, feature-based structure.

State & data layer: Zustand for local state and React Query for API sync, caching, retries, and pagination.

Authentication & wallets: Privy email OTP flow, username onboarding, embedded wallet creation, and token refresh handling.

UI system: NativeWind-based design system with reusable components and a polished dark theme.

Release ownership: EAS builds, environment separation, preview vs production variants, store submissions.

Video: expo-video + expo-camera for full-screen vertical playback and recording.

Trading: viem with Base (mainnet + testnet) support; charts via react-native-wagmi-charts.

API surface: Typed client (~50+ endpoints) covering feeds, users, trading, wallet, and inbox to keep the app predictable as the backend evolved.

Used by 100+ real users in production

Stable mobile surface that supported rapid backend and on-chain iteration without blocking releases