Freelance Mobile App Developer (iOS / Android)

Job Description Roles & Responsibilities 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 within our hybrid AI + human environment. In this role, as an AI Pilot that's how we refer to this position at Mindrift 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. 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. What We Do The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe. About the Role 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. Key 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. Implement monetization features where required (in-app purchases, ads, subscriptions). 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 and benefits 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 refine AI-assisted output into 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) Project time expectations 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. Desired Candidate Profile 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 refine AI-assisted output into 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) Company Industry InternetE-commerceDotcom Department / Functional Area IT Software Keywords Freelance Mobile App Developer (iOS / Android) Get real-time job updates only on our App