Mobile Developer (iOS / Android)

1. 1
   Choose Your Platform: iOS, Android, or Cross-Platform

   iOS development uses Swift (Apple's modern language) + Xcode IDE — requires a Mac. Android development uses Kotlin (Google's preferred language) + Android Studio — runs on Mac, Windows, or Linux. React Native (Meta's framework) and Flutter (Google's framework) allow building apps for both iOS and Android from a single codebase — the dominant approach for startups and teams that need both platforms. Career recommendation: deep native expertise (Swift or Kotlin) pays more at senior levels; React Native or Flutter is more accessible for beginners and opens both platforms simultaneously.

   Swift + Xcode (iOS) or Kotlin + Android Studio
2. 2
   Complete Apple's Swift UI or Android's Jetpack Compose Training

   Official platform documentation is the best learning resource for mobile development: Apple's SwiftUI tutorials (free at developer.apple.com) provide structured learning from Apple itself. Google's Android Basics with Compose course (free on developer.android.com) covers Kotlin and Jetpack Compose (modern Android UI framework). These free official resources are more current and more accurate than most third-party courses.

   Apple SwiftUI tutorials or Android Basics with Compose
3. 3
   Build and Publish a Real App

   Publishing an app to the App Store ($99/year Apple Developer Program) or Google Play ($25 one-time fee) is the most credible portfolio item for a mobile developer. It demonstrates: end-to-end development capability, understanding of platform guidelines and app store review process, and the ability to ship real software to real users. Build something you'd actually use — authenticity in portfolio projects is visible to experienced interviewers.

   Published App Store or Google Play app — portfolio
4. 4
   Learn Mobile-Specific Architecture and Patterns

   Mobile development has specific architectural patterns: MVVM (Model-View-ViewModel — the standard for both Swift and Kotlin), data persistence (Core Data for iOS, Room database for Android), networking and API integration, push notifications, local authentication (Face ID, Touch ID), and background processing. Deep architectural knowledge separates senior mobile developers from those who can only build simple apps.

   MVVM + Core Data / Room + networking + auth
5. 5
   Add React Native or Flutter for Cross-Platform Scope

   React Native ($108K median, Meta's framework using JavaScript/TypeScript) or Flutter ($105K median, Google's framework using Dart) provide cross-platform mobile development capability. For developers with web background, React Native is natural. Flutter is increasingly adopted for new projects. Meta and Google certifications exist, though portfolio projects are more valuable than certificates in mobile development hiring.

   React Native or Flutter cross-platform development

• 9:00 AMSprint standup — 3 items for the week: complete the medication reminder notification system, fix the crash reported in TestFlight (affects iOS 17.4 users), and review the Android developer's PR for API contract changes.
• 9:30 AMCrash fix — the TestFlight crash is a nil force-unwrap in the health data model when HealthKit returns no data (new iOS 17.4 behavior). Add a guard statement with a graceful fallback. Write a unit test that mocks the nil HealthKit response. Submit the fix to TestFlight for QA.
• 11:00 AMPush notification system — implement local notifications for medication reminders using UNUserNotificationCenter. Handle authorization request, schedule repeating notifications with the user's medication schedule, handle notification tap to deep-link into the medication detail view. Test on device — notifications fire correctly in foreground, background, and terminated states.
• 12:00 PMLunch — 30 minutes.
• 1:00 PMAPI contract review — the Android developer changed the medication dosage endpoint response structure. Review the diff: the `dose_unit` field changed from a string to an enum. Update the Swift Codable model, update the mapping logic, verify the UI handles the new type correctly. Approve the PR with a note about the iOS model changes already made.
• 2:30 PMPerformance optimization — the medication list view has slow scroll performance on older iPhones. Profile with Instruments: main thread blocked by a date formatter initialized on each cell draw. Move the formatter to a static property. Scroll performance improves from 45 FPS to 60 FPS on iPhone 11.
• 4:30 PMApp Store Connect — prepare the TestFlight build for QA: update the release notes, configure the build for internal testing, and submit to Apple. Estimated review: 2–4 hours for TestFlight builds.

Mobile developers build iOS and Android applications — a role where AI code generation tools are significantly accelerating development productivity. The resilient tier is the developer who designs user experiences, architects complex app systems, and integrates native platform capabilities that AI tools cannot handle end-to-end.