Freelance Mobile App Developer (iOS / Android)

Freelance Mobile App Developer (iOS / Android)

Company: Mindrift Location: Remote (Germany-based preferred) Contract: Freelance Work Model: Remote Seniority: Mid-level

Mindrift is seeking skilled Mobile App Developers to join the Tendem project, building native and cross-platform mobile applications within a hybrid AI and human environment. As an "AI Pilot," you will collaborate with AI agents, providing mobile engineering expertise, platform-specific judgment, and quality control to ensure applications are stable, performant, and ready for real users. This part-time remote opportunity is ideal for professionals with hands-on experience shipping iOS and/or Android apps, working with platform APIs, and managing the full mobile development lifecycle.

About Mindrift

The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by leveraging real-world expertise from across the globe.

About the Role

This is a freelance role for a Tendem project. You will design, build, and refine mobile applications across various categories, including utilities, fitness/wellness, games, productivity, delivery, and content apps. You will work on 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 adhere to platform conventions (iOS Human Interface Guidelines, Material Design).
• Integrate native device features such as the camera, push notifications, location services, storage, and biometrics.
• Connect applications to backend APIs, manage offline states, caching, and synchronization.
• Implement monetization features like in-app purchases, ads, and subscriptions where required.
• Evaluate AI-generated mobile code and refactor it for correctness, performance, battery efficiency, and maintainability.
• Debug platform-specific issues and prepare builds for distribution via TestFlight and Google Play Console.

Requirements

• At least 3 years of relevant experience in mobile app development.
• A 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 the following: 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 asynchronous data, and managing local storage.
• Familiarity with native device APIs (notifications, camera, location, storage, biometrics).
• Experience with mobile build tools, code signing, and submission processes for the App Store and Google Play.
• Strong attention to detail and a commitment to performance, stability, and platform polish.
• A self-directed work ethic with the ability to independently ship complete mobile features.
• A portfolio of shipped mobile apps (App Store / Google Play links preferred).
• English proficiency: Upper-intermediate (B2) or above.

A plus:

• Bachelor's or Master's Degree in Computer Science, Engineering, Information Technology, or a related technical field.
• Experience implementing in-app purchases, ads, or subscriptions.
• Familiarity with backend services such as Firebase, Supabase, or similar.

Project Details

• Estimated Workload: 10–20 hours per week during active project phases. This is an estimate and not a guaranteed workload.
• Compensation: Up to $60 per hour equivalent, depending on your skill level and contribution pace. Compensation varies across projects.

Why This Opportunity?

• Work fully remote on your own schedule with just a laptop and stable internet.
• Gain unique experience in a hybrid AI and human collaboration environment, a distinctive skill set in a growing field.
• Participate in performance-based bonus programs that reward high-quality work and consistent delivery.