Freelance Mobile App Developer (iOS / Android)

Mindrift connects specialists with innovative technology projects to develop high-quality AI technologies globally. The role is for the Tendem project to build native and cross-platform mobile applications for real-world use cases.

• At least 3 years of relevant experience in mobile app development.
• Hands-on experience with at least one of: React Native, Flutter, Swift/SwiftUI (iOS), or Kotlin/Jetpack Compose (Android).
• Solid understanding of mobile UI patterns, navigation, state management, and platform guidelines.
• Experience integrating REST APIs, handling async data, and managing local storage.
• Familiarity with native device APIs including notifications, camera, location, storage, and biometrics.
• Experience with mobile build tools, code signing, and app submission to App Store and Google Play.
• Experience implementing in-app purchases, ads, or subscriptions is a plus.
• Familiarity with backend services such as Firebase or Supabase is a plus.
• Strong attention to detail and commitment to performance, stability, and polish.
• Ability to ship complete mobile features independently.
• Portfolio of shipped mobile apps with App Store/Google Play links preferred.
• English proficiency: upper-intermediate (B2) or above.

• Build mobile applications using React Native, Flutter, Swift (iOS), or Kotlin (Android).
• Implement responsive mobile UIs following platform conventions (iOS HIG, Material Design).
• Integrate native device features like camera, push notifications, location, storage, and biometrics.
• Connect apps to backend APIs; handle offline state, caching, and synchronization.
• Implement monetization features such as in-app purchases, ads, and subscriptions.
• Review, debug, optimize, and refactor mobile app code for performance, battery efficiency, and maintainability.
• Debug platform-specific issues and prepare builds for distribution via TestFlight, Play Console.

English proficiency at upper-intermediate (B2) level or above is required.