Freelance Mobile App Developer (iOS / Android)

Role overview

Mindrift is hiring a Freelance Mobile App Developer (AI Pilot) for the Tendem project. You’ll build and refine native and cross-platform mobile applications (iOS, Android, or both), collaborating with Tendem Agents that handle repetitive tasks while you apply mobile engineering expertise, platform judgment, and quality control.

Responsibilities

• Design, build, and refine mobile applications for categories such as utilities, fitness/wellness, games, productivity, delivery, and content apps
• Build with React Native, Flutter, Swift (iOS), or Kotlin (Android)
• Create responsive UIs that follow platform conventions (iOS HIG, Material Design)
• Integrate native device features: camera, push notifications, location, storage, biometrics
• Connect apps to backend APIs and manage offline state, caching, and synchronization
• Implement monetization features as needed (in-app purchases, ads, subscriptions)
• Review and refactor AI-generated mobile code for correctness, performance, battery efficiency, and maintainability
• Diagnose platform-specific issues and prepare builds for distribution (TestFlight, Play Console)

Requirements

• At least 3 years of relevant mobile app development experience (required)
• Strong foundation in mobile UI/UX patterns, navigation, and state management
• Ability to integrate device APIs and backend services; refine AI-assisted output into production-ready apps
• Solid experience with at least one of:
  • React Native
  • Flutter
  • Swift / SwiftUI (iOS)
  • Kotlin / Jetpack Compose (Android)
• Experience with REST APIs, async data handling, and local storage
• Familiarity with mobile build tools, code signing, and app store submission
• Strong attention to detail and commitment to performance and stability
• Portfolio of shipped mobile apps (required; App Store / Google Play links preferred)
• English proficiency B2 or above (required)

Nice-to-haves

• Experience with in-app purchases, ads, or subscriptions
• Familiarity with backend services such as Firebase or Supabase
• Bachelor’s or Master’s degree in CS/Engineering/IT or related field

Working time & compensation

• Estimated 10–20 hours/week during active phases (estimate, not guaranteed)
• Freelance compensation: up to $60 per hour