Freelance Mobile App Developer (iOS / Android)

Role Overview

Mindrift is seeking a Freelance Mobile App Developer (iOS/Android) to join the Tendem project. In this role (called an AI Pilot), you collaborate with Tendem Agents for repetitive tasks while applying your mobile engineering expertise to deliver stable, performant, production-ready apps on real devices.

What You’ll Do

• Design, build, and refine mobile applications across categories such as utilities, fitness/wellness, games, productivity, delivery, and content.
• Build using React Native, Flutter, Swift (iOS), or Kotlin (Android) (native or cross-platform).
• Create responsive mobile UIs following platform conventions:
  • iOS HIG
  • Material Design
• Integrate native device capabilities (e.g., camera, push notifications, location, storage, biometrics).
• Connect to backend APIs; implement offline behavior, caching, and synchronization.
• Add monetization when required (in-app purchases, ads, subscriptions).
• Review AI-generated mobile code and refactor for:
  • correctness
  • performance
  • battery usage
  • maintainability
• Troubleshoot platform-specific issues and prepare builds for distribution:
  • TestFlight
  • Play Console

Requirements

• At least 3 years of relevant mobile app development experience (required).
• B2+ English proficiency (required).
• Strong foundation in:
  • mobile application development
  • platform-specific UI/UX patterns
  • stable, high-quality iOS/Android experiences
• Hands-on experience with at least one of:
  • React Native
  • Flutter
  • Swift / SwiftUI (iOS)
  • Kotlin / Jetpack Compose (Android)
• Solid understanding of mobile UI patterns, navigation, state management, and platform guidelines.
• Experience integrating REST APIs, async data, and local storage.
• Familiarity with native device APIs (notifications, camera, location, storage, biometrics).
• Experience with mobile build tools, code signing, and app store submissions.
• Portfolio of shipped mobile apps (required; App Store / Google Play links preferred).
• Ability to work independently and ship complete features.

Nice to Have

• Degree in CS/Engineering/IT or related field.
• Monetization experience: in-app purchases, ads, subscriptions.
• Backend familiarity: Firebase, Supabase, or similar.
• Experience with SwiftUI and/or Jetpack Compose specifically.

Schedule & Workload

• Estimated 10–20 hours/week during active phases (estimate only; not guaranteed).

Compensation

• Up to $60/hour.