Freelance Mobile App Developer (iOS / Android)

This is a freelance role for a Tendem project. As a Mobile App Developer, you'll design, build, and refine mobile applications across categories such as utilities, fitness/wellness, games, productivity, delivery, and content apps - for iOS, Android, or both, using native or cross-platform frameworks.

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

- At least 3 years of relevant experience in mobile app development (required). - Bachelor's or Master's Degree in Computer Science, Engineering, Information Technology, or related technical fields is a plus.

Candidates should have a strong foundation in mobile application development, platform-specific UI/UX patterns, and building stable, high-quality mobile experiences for iOS and Android. We are looking for specialists who can confidently work with native or cross-platform frameworks, integrate device APIs and backend services, and build production-ready mobile applications.

Strong attention to detail, performance awareness, and the ability to work independently are essential.

- 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 (notifications, camera, location, storage, biometrics). - Experience with mobile build tools, code signing, and submission to App Store / Google Play. - Experience implementing in-app purchases, ads, or subscriptions is a plus. - Familiarity with backend services such as Firebase, Supabase, or similar is a plus.

- Strong attention to detail and commitment to performance, stability, and platform polish. - Self-directed work ethic with the ability to ship complete mobile features independently. - Portfolio of shipped mobile apps (required, with App Store / Google Play links preferred). - English proficiency: Upper-intermediate (B2) or above (required)

Why this freelance opportunity might be a great fit for you?

- Work fully remote on your own schedule with just a laptop and stable internet connection. - Apply your expertise to real-world technology projects while gaining experience building high-quality solutions for a global platform. - Participate in performance-based bonus programs that reward high-quality work and consistent delivery.

Mindrift is looking for skilled Mobile App Developers (React Native, Flutter, Swift, or Kotlin) to join the Tendem project ( https://tendem.ai/ ) and build native and cross-platform mobile applications for real-world use cases. In this role, you'll apply your mobile engineering expertise to build stable, performant, and user-friendly applications for iOS and Android.

This part-time remote opportunity is ideal for professionals with hands-on experience shipping iOS and/or Android apps, working with platform APIs, and handling the full mobile development lifecycle.

The Mindrift platform connects specialists with innovative technology projects. Our mission is to help develop high-quality AI technologies by combining real-world expertise from professionals across the globe with advanced AI development efforts.

This is a freelance role for a Tendem project. As a Mobile App Developer, you'll design, build, and refine mobile applications across categories such as utilities, fitness/wellness, games, productivity, delivery, and content apps — for iOS, Android, or both, using native or cross-platform frameworks.

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

• At least 3 years of relevant experience in mobile app development (required).
• Bachelor's or Master's Degree in Computer Science, Engineering, Information Technology, or related technical fields is a plus.

Candidates should have a strong foundation in mobile application development, platform-specific UI/UX patterns, and building stable, high-quality mobile experiences for iOS and Android. We are looking for specialists who can confidently work with native or cross-platform frameworks, integrate device APIs and backend services, and build production-ready mobile applications.

Strong attention to detail, performance awareness, and the ability to work independently are essential.

• 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 (notifications, camera, location, storage, biometrics).
• Experience with mobile build tools, code signing, and submission to App Store / Google Play.
• Experience implementing in-app purchases, ads, or subscriptions is a plus.
• Familiarity with backend services such as Firebase, Supabase, or similar is a plus.

• Strong attention to detail and commitment to performance, stability, and platform polish.
• Self-directed work ethic with the ability to ship complete mobile features independently.
• Portfolio of shipped mobile apps (required, with App Store / Google Play links preferred).
• English proficiency: Upper-intermediate (B2) or above (required)

For this project, tasks are estimated to require around 10–20 hours per week during active phases, based on project requirements. This is an estimate, not a guaranteed workload, and applies only while the project is active.

On this project, contributors can earn up to $60 per hour equivalent , depending on their level and pace of contribution.

Why this freelance opportunity might be a great fit for you?

• Work fully remote on your own schedule with just a laptop and stable internet connection.
• Apply your expertise to real-world technology projects while gaining experience building high-quality solutions for a global platform.
• Participate in performance-based bonus programs that reward high-quality work and consistent delivery.