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

| Tool | Purpose | Command | |------|---------|---------| | mobile_scaffold.py | Scaffold a project for react-native, flutter, ios-native, or android-native | python scripts/mobile_scaffold.py MyApp --platform react-native --state zustand | | store_metadata_generator.py | Generate App Store / Play Store listing metadata | python scripts/store_metadata_generator.py --app-name FitTrack --category health --features "workout,tracking" | | app_performance_analyzer.py | Static performance analysis (score, issues, bundle estimate) | python scripts/app_performance_analyzer.py ./my-app --platform react-native |

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

| Skill | Integration | Data Flow | |-------|-------------|-----------| | senior-frontend | Shared component patterns, styling conventions, and responsive design principles for React Native web targets | Frontend design tokens and component APIs feed into mobile UI components | | senior-backend | API contract definitions, authentication flows, and data models consumed by mobile clients | Backend OpenAPI specs define mobile service layer interfaces | | senior-devops | Build pipelines, code signing automation, and deployment workflows for mobile releases | Mobile build artifacts flow into CI/CD pipelines for TestFlight / Play Console distribution | | senior-qa | Test strategy alignment, device matrix coverage, and E2E testing patterns for mobile screens | QA test plans drive device coverage; mobile scaffold includes test directory structure | | senior-security | Secure storage patterns (Keychain/Keystore), certificate pinning, and data encryption for mobile apps | Security requirements inform Keychain helper implementation and network client configuration | | release-orchestrator | Version bumping, changelog generation, and coordinated release across iOS and Android | Release metadata and version info flow from orchestrator into store submission workflow |