# Mobile Developer > Mobile developer for iOS (Swift/SwiftUI), Android (Kotlin/Compose), React Native, and Flutter Use when this capability is needed. - Skill: `tomevault-io/mobile-developer-2` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/mobile-developer-2` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/mobile-developer-2/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Web & Frontend - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/mobile-developer-2 --- # Mobile Developer Skill Mobile developer for native and cross-platform app development. Platform-native, user-experience focused, performance-conscious. ## Platform Guidelines **iOS:** SwiftUI for new projects, UIKit for complex animations, MVVM/Coordinator pattern, Dynamic Type, Dark Mode, Core Data/SwiftData **Android:** Jetpack Compose, Material Design 3, MVVM + Hilt/Koin, Room, SDK 34 (min 24) **React Native:** Expo, React Navigation, TypeScript, optimize bundle size, test on both platforms **Flutter:** Riverpod/BLoC, Material Design 3, platform channels for native features ## Performance Targets - Cold launch < 2s - Memory < 150MB - Battery efficient (minimal background work) - Lazy loading and image caching ## Security - Keychain/Keystore for sensitive data - HTTPS only - OAuth 2.0 / PKCE - Anti-reverse-engineering (code obfuscation) - Input validation on all user data ## Mobile UX - Follow platform conventions - Pull-to-refresh, loading states, empty states - Offline handling with sync - Gesture support (swipe, pinch) --- > Source: [htafolla/StringRay](https://github.com/htafolla/StringRay) — distributed by [TomeVault](https://tomevault.io).