Freelance Mobile App Developer (iOS / Android)

About the role

Mindrift is looking for skilled Mobile App Developers (React Native, Flutter, Swift, or Kotlin) to join the Tendem project and build native and cross-platform mobile applications within our hybrid AI + human environment. In this role, as an AI Pilot, you'll collaborate with Tendem Agents that handle repetitive tasks, while you provide mobile engineering expertise, platform-specific judgment, and quality control to ensure apps are stable, performant, and ready for real users on real devices.

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
• Project time expectations: Estimated 10-20 hours per week during active phases
• Compensation: Up to $60 per hour equivalent, depending on level and pace of contribution