Mobile Developer Job Description Template (2026)

Full JD (copy-ready)

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# Mobile Developer — Job Description

## Role summary
A Mobile Developer owns the iOS, Android, or cross-platform app end to end: shipping screens in Swift/SwiftUI, Kotlin/Jetpack Compose, React Native, or Flutter, handling App Store and Play Console submissions, wiring up push notifications and in-app purchases, and keeping crash-free session rates above 99.5% through Sentry or Crashlytics instrumentation, Fastlane-driven release trains, and disciplined profiling of cold start and memory usage.

## Responsibilities
- Ship production screens and flows in Swift/SwiftUI, Kotlin/Jetpack Compose, React Native, or Flutter against Figma specs.
- Manage the full release pipeline through Fastlane, TestFlight, and Google Play internal/alpha/beta tracks with staged rollouts.
- Handle App Store and Play Store submissions end-to-end, including privacy nutrition labels, ATT prompts, data safety forms, and Resolution Center responses to rejections.
- Integrate push notifications through APNs, Firebase Cloud Messaging, and OneSignal with deep-link routing and permission prompts timed to onboarding.
- Ship StoreKit 2 and Google Play Billing flows with server-side receipt validation and RevenueCat-managed subscription state including renewals, refunds, and trial abuse detection.
- Implement universal links, Android App Links, and branch.io-style deferred deep linking so marketing campaigns route in-app rather than to the browser.
- Wire up biometric authentication via LocalAuthentication (Face ID/Touch ID) and BiometricPrompt, with keychain and Keystore fallback for secure credential storage.
- Profile memory and performance with Xcode Instruments (Leaks, Allocations, Time Profiler) and Android Studio Profiler; fix retain cycles, jank, and cold-start regressions.
- Build offline-first sync with local persistence (Core Data, Room, WatermelonDB, or SQLite) and conflict resolution on reconnect.
- Instrument crash reporting in Sentry, Crashlytics, or Bugsnag with release tagging, dSYM/ProGuard uploads in CI, and user context for reproduction.
- Monitor release health via crash-free session rate thresholds and trigger rollbacks through phased release or staged rollout when regressions appear.
- Review peer PRs for memory safety, threading correctness, accessibility (Dynamic Type, VoiceOver, TalkBack), and lifecycle handling.

## Must-have skills
- 3+ years shipping production mobile apps with at least one live in the App Store or Google Play under a US or European client.
- Strong command of at least one stack: Swift 5+/SwiftUI, Kotlin/Jetpack Compose, React Native 0.70+, or Flutter 3+.
- Hands-on experience with Xcode provisioning, certificates, App Store Connect, and Google Play Console release management.
- Push notification integration via APNs and FCM including background handlers and silent pushes.
- In-app purchase implementation with StoreKit 2 or Google Play Billing and server-side receipt validation.
- Memory profiling and performance tuning using Instruments or Android Profiler, with concrete examples of fixes shipped.
- Understanding of mobile lifecycle events, background modes, and OS-level constraints (Doze, App Standby, iOS background execution limits).
- Strong written English for async spec discussions and code review.

## Nice-to-have skills
- Experience migrating a React Native app to native Swift/Kotlin or vice versa.
- WidgetKit, App Clips, or Android App Widgets experience.
- Bluetooth Low Energy, CoreML, or ARKit/ARCore work on a production app.
- Accessibility certification or shipped compliance work on VoiceOver/TalkBack flows.
- Contributions to an open-source mobile library or SDK.

## Tools and technology
- Swift 5+ / SwiftUI
- Kotlin / Jetpack Compose
- React Native 0.70+ / Flutter 3+
- Xcode 15+ / Android Studio
- Fastlane (Match, Deliver, Supply)
- Firebase (FCM, Crashlytics, Performance)
- Sentry / Bugsnag
- RevenueCat
- TestFlight / Google Play Console
- Charles Proxy / Proxyman

## Reporting structure
Reports to the Mobile Engineering Lead or Head of Engineering. Collaborates daily with product designers (Figma handoff, platform-specific interaction patterns), backend engineers (API contracts, push payload shapes), QA (TestFlight builds, device matrix), and the product manager for release planning.

## Success metrics (KPIs)
- Crash-free session rate above 99.5% on both iOS and Android across the last 4 releases.
- App Store and Play Store review pass rate above 90% on first submission.
- Cold start under 2 seconds on mid-tier devices (iPhone SE 2, Pixel 6a).
- Release cadence: at least one production release every 2 weeks without missed deadlines.
- P0/P1 production bug MTTR under 24 hours from triage to store-approved hotfix.
- App size growth budget held under 5% per quarter unless justified by a shipped feature.