Freelance Mobile App Developer (iOS / Android)

Remote from: Canada
Salary, yearly, CAD: 120,000
Department: Software Engineering
Employment type: Full Time,
Job posted: 13 Jul 2026
Apply before: 13 Aug 2026
Experience level: Midweight
Views / Applies: 29 / 2

Mindrift connects AI experts and clients to advance Generative AI models.

AI Summary

Mindrift is seeking a freelance Mobile App Developer for the Tendem project, involving building native and cross-platform mobile applications using React Native, Flutter, Swift, or Kotlin. The role focuses on collaborating with AI agents, handling platform-specific UI/UX, integrating device features and backend APIs, and ensuring app stability and performance. Candidates need at least 3 years of experience and a portfolio of shipped apps. This part-time role offers 10-20 hours weekly, with a salary based on the provided minimum of 120,000 CAD yearly.

Role DNA

Job Complexity

Easy Hard

Pace & Pressure

Relaxed Fast-paced

Autonomy Level

Guided Full Ownership

Communication Load

Independent Highly Collaborative

AI Insight The role requires 3+ years of experience and technical depth in mobile development, but it's a freelance position with defined tasks, making it moderately challenging.

Salary Analysis

AI Insight The offered salary of 120,000 CAD is at the higher end of the market range for mobile app developers in Canada, likely reflecting the specialized AI context and required experience. It is competitive for a freelance role.

Core Skills Required

React Native Flutter Swift Kotlin iOS Android REST APIs Firebase Mobile UI/UX App Store Distribution

Cover Letter Sample

Dear Hiring Manager,

I am excited to apply for the Freelance Mobile App Developer position at Mindrift. With over 4 years of experience building native and cross-platform apps using Swift, Kotlin, and Flutter, I have successfully shipped multiple apps to the App Store and Google Play. My expertise in integrating REST APIs, handling offline storage, and optimizing performance aligns well with the requirements for the Tendem project.

I am particularly drawn to the hybrid AI-human environment and the opportunity to refine AI-generated code. I am confident in my ability to ensure high-quality, performant mobile applications. I look forward to contributing my skills to this innovative project.

Sincerely, [Your Name]

Sample Interview Questions

Describe your experience with building and shipping a mobile app using React Native or Flutter. What challenges did you face?

I built a cross-platform fitness app using React Native. Challenges included performance optimization for animations and handling platform-specific navigation. I used React Native Reanimated for smooth animations and customized navigation per platform.

How do you integrate native device features like camera or location into a cross-platform app?

I use plugins like react-native-camera or location packages. I ensure proper permissions handling and fallback for unsupported features. For example, using react-native-permissions to manage permission requests.

Explain your approach to debugging platform-specific issues in iOS vs Android.

I use platform-specific logs and tools like Xcode's debugger and Android Studio's profiler. I'm familiar with common differences like file paths or API behaviors, and I test on real devices to catch issues early.

How do you handle offline state and data synchronization in mobile apps?

I implement local caching using SQLite or Realm, and use background sync with libraries like WorkManager (Android) or BGTaskScheduler (iOS). I design for conflict resolution and provide UI feedback for syncing status.

Can you walk through your process for submitting an app to the App Store and Google Play?

I prepare metadata, screenshots, and ensure compliance with guidelines. For iOS, I use Xcode for archiving and TestFlight for beta testing. For Android, I generate signed APK/AAB, test with internal track, then promote to production. I handle code signing and store listing optimization.

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.

Compensation

On this project, 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. Please note that other projects on the platform may offer different earning levels based on their requirements.

Why this freelance opportunity might be a great fit for you?

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 — a distinctive skill set in a rapidly growing field.
Participate in performance-based bonus programs that reward high-quality work and consistent delivery.

Apply now >