Senior Mobile Developer

Expert mobile application development across iOS, Android, React Native, and Flutter — scaffolding production projects, building MVVM features (SwiftUI, Jetpack Compose, Expo Router), static performance analysis, and App Store / Play Store submission.

Keywords

mobile, ios, android, react-native, flutter, swift, kotlin, swiftui, jetpack-compose, expo-router, zustand, app-store, performance, offline-first

Core Capabilities

• Project scaffolding — production-ready structure, navigation, and state management for React Native (Expo Router), Flutter, iOS native (SwiftUI), and Android native (Jetpack Compose).
• Platform selection — decision matrix across native iOS/Android, React Native, and Flutter by language, performance, and code-sharing.
• Feature architecture — MVVM patterns: SwiftUI @MainActor ViewModels, Compose sealed UiState + StateFlow, Zustand stores.
• Performance optimization — static analysis of image assets, re-renders, memory leaks, bundle size, plus FlatList/RecyclerView/collection-view tuning.
• Store submission — metadata, keywords, privacy labels, age ratings, and submission checklists for both stores.

When to Use

• Starting a new mobile app and choosing a platform.
• Building a SwiftUI, Jetpack Compose, or React Native feature with clean architecture.
• Diagnosing and fixing mobile performance issues.
• Preparing an App Store / Play Store submission.

Clarify First

Before scaffolding, confirm these inputs. If any is unknown or vague, ASK — do not assume:

• Platform — react-native / flutter / ios-native / android-native (--platform; an entirely different scaffold)
• State management — e.g. zustand (--state; changes the generated architecture)
• Task — new project scaffold vs store-listing metadata vs performance analysis (selects mobile_scaffold / store_metadata_generator / app_performance_analyzer)

Stop rule: ask only the 2-3 that most change the output. If the user says "just draft it," proceed and list your assumptions at the top of the artifact.

Tools

References

Load the reference that matches the task — keep this file lean and pull detail on demand:

• references/workflows.md — the platform decision matrix and all five end-to-end workflows (React Native scaffold, SwiftUI feature, Jetpack Compose feature, performance optimization, store submission) with SwiftUI/Compose code examples. Read when executing any workflow.
• references/tool-reference.md — full parameter tables, examples, and output formats for the three scripts. Read when running the scripts.
• references/troubleshooting-and-success.md — the build/render/submission troubleshooting table and the success-criteria bar. Read when debugging or validating quality.
• references/react-native-patterns.md — production React Native: navigation, state management, performance, testing, native modules, OTA updates. Read for deep RN work.
• references/ios-android-patterns.md — native iOS/Android architecture, UI frameworks, concurrency, platform UX guidelines, and CI/CD. Read for deep native work.
• references/mobile-security-guide.md — secure storage, network security, authentication, code protection, and OWASP Mobile Top 10 compliance. Read when hardening an app.
• REFERENCE.md — extended code examples for the workflows above. Read when you need fuller worked code.

Scope & Limitations

This skill covers:

• Scaffolding production-ready mobile projects for React Native (Expo Router), Flutter, iOS native (SwiftUI), and Android native (Jetpack Compose).
• Static performance analysis including image asset sizing, re-render detection, memory leak patterns, and bundle size estimation.
• App Store and Play Store metadata generation including titles, keywords, privacy labels, age ratings, and submission checklists.
• Platform-specific architecture patterns (MVVM, state management, navigation).

This skill does NOT cover:

• Backend API development or server-side logic (see senior-backend and senior-fullstack skills).
• CI/CD pipeline configuration for mobile builds and automated distribution (see senior-devops and release-orchestrator skills).
• UI/UX design systems, accessibility auditing, or design token management (see senior-frontend and design-auditor skills).
• Runtime profiling with native tools (Xcode Instruments, Android Studio Profiler) -- the analyzer performs static code analysis only, not live device profiling.

Integration Points