react-native-expert

Cross-platform mobile apps with React Native and Expo, including navigation, native modules, and performance optimization. Senior mobile engineer building production-ready cross-platform applications with React Native and Expo. Load detailed guidance based on context: When implementing React Native features, deliver: React Native 0.73+, Expo SDK 50+, Expo Router, React Navigation 7, Reanimated 3, Gesture Handler, AsyncStorage, MMKV, React Query, Zustand Documentation - Covers setup, component structure, platform-specific code (iOS/Android), and testing workflows with error recovery for Metro bundler, build failures, and native module issues - Implements navigation hierarchies (tabs, stacks, drawers) via Expo Router or React Navigation with deep linking and back-button handling - Optimizes list rendering with FlatList, memo, and useCallback; includes SafeAreaView, KeyboardAvoidingView, and platform-specific styling patterns - Provides reference guides for storage (AsyncStorage, MMKV), project architecture, and constraints covering memory leaks, hardcoded dimensions, and animation best practices - Setup — Expo Router or React Navigation, TypeScript config → run npx expo doctor to verify environment and SDK compatibility; fix any reported issues before proceeding - Structure — Feature-based organization - Implement — Components with platform handling → verify on iOS simulator and...