VS01671 - Mobile Development Engineer (React Native)

JavaScript (core)- ES6+ to the same standard as the web role

TypeScript -Standard for all React Native work. Missing from the original list - should be mandatory
React Native- Core components, Flexbox layout, platform-specific code, FlatList optimisation, gesture and animation handling (Reanimated / Gesture Handler), styling across screen sizes
React fundamentals- Hooks and component patterns - same depth as the web role
Navigation- React Navigation - stack, tab and drawer navigators, params, deep linking
State management -Redux Toolkit / Zustand / Context, plus React Query for server state
iOS publishing- Apple Developer account handling, certificates, provisioning profiles, bundle identifiers, Xcode build and archive, App Store Connect, TestFlight distribution, App Store review guidelines, privacy nutrition labels, App Tracking Transparency
Android publishing- Keystore generation and safe storage, signed AAB builds, Google Play Console, internal / closed / open testing tracks, staged rollout, target-SDK compliance, Data Safety form, Play policy compliance
Release management- Versioning and build numbers, release notes, rollback plan, handling a store rejection and resubmitting
Expo vs bare- Knows the trade-offs, can work in both, can eject or migrate when a native module demands it
Native basics- Enough Swift/Objective-C and Kotlin/Java to read a native module, link a library, and fix a Gradle or Cocoa Pods build failure
Device permissions- Camera, location, storage, contacts, notifications - request flows and store-required justifications on both platforms
Push notifications - Firebase Cloud Messaging and APNs, token handling, foreground / background / killed-state behaviour, deep-link on tap
Local storage offline- Async Storage, MMKV, SQLite or WatermelonDB; offline-first behaviour and sync-on-reconnect
API integration -REST consumption, auth token refresh, retry and timeout handling, poor-network resilience
Debugging profiling -Hermes, React DevTools, Flipper, Xcode Instruments, Android Studio Profiler, physical-device testing
Crash analytics -Sentry or Firebase Crashlytics; Firebase Analytics / Mixpanel event tracking