Freelance Mobile App Developer (iOS / Android)

About the role

Mindrift is looking for skilled Mobile App Developers to join the Tendem project. 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.

Responsibilities

• 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
• Evaluate AI-generated mobile code and refactor it for correctness, performance, battery use, and maintainability
• Debug platform-specific issues and prepare builds for distribution (TestFlight, Play Console)

Requirements

• At least 3 years of relevant experience in mobile app development
• Strong foundation in mobile application development, platform-specific UI/UX patterns, and building stable, high-quality mobile experiences for iOS and Android
• 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
• Familiarity with backend services such as Firebase, Supabase, or similar
• 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

Benefits

• Upper-intermediate (B2) or above English proficiency
• Opportunity to work fully remote on your own schedule with just a laptop and stable internet connection
• Gain hands-on experience in a unique hybrid environment where human expertise and AI agents collaborate seamlessly
• Participate in performance-based bonus programs that reward high-quality work and consistent delivery

Pay

Contributors can earn up to $60 per hour equivalent, depending on their level and pace of contribution. Compensation varies across projects depending on scope, complexity, and required expertise.

Schedule

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.