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. This is a freelance role for a Tendem project. You will collaborate with Tendem Agents that handle repetitive tasks, providing mobile engineering expertise, platform-specific judgment, and quality control to ensure apps are stable, performant, and ready for real users on real devices.

Responsibilities

• 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.
• 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.
• Bachelor's or Master's Degree in Computer Science, Engineering, Information Technology, or related technical fields (plus).
• A strong foundation in mobile application development, platform-specific UI/UX patterns, and building stable, high-quality mobile experiences for iOS and Android.
• Experience with at least one of: React Native, Flutter, Swift/SwiftUI (iOS), or Kotlin/Jetpack Compose (Android).
• 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.
• A self-directed work ethic with the ability to ship complete mobile features independently.

Benefits

• Portfolio of shipped mobile apps (with App Store / Google Play links preferred).
• Upper-intermediate (B2) or above English proficiency.

Project Time Expectations

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.

Compensation

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.