Freelance Mobile App Developer (iOS / Android)

Role Overview

Mindrift is seeking a Freelance Mobile App Developer for the Tendem project to build native and cross-platform iOS and Android apps. This is a part-time remote opportunity where you’ll work across the mobile development lifecycle, shipping stable, performant, user-friendly mobile experiences.

Responsibilities

• Design, build, and refine mobile applications for categories such as utilities, fitness/wellness, games, productivity, delivery, and content
• Build apps using 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 to backend REST APIs; handle offline state, caching, and sync
• Implement monetization when required (in-app purchases, ads, subscriptions)
• Review, debug, optimize, and refactor for correctness, performance, battery efficiency, and maintainability
• Fix platform-specific issues and prepare builds for distribution (TestFlight, Play Console)

Requirements

• At least 3 years of relevant mobile app development experience (required)
• Hands-on experience with at least one of:
  • React Native
  • Flutter
  • Swift / SwiftUI (iOS)
  • Kotlin / Jetpack Compose (Android)
• Strong understanding of mobile UI patterns, navigation, and state management
• Experience integrating REST APIs, async data handling, and local storage
• Experience with mobile build tools, code signing, and submission to App Store / Google Play
• Experience with monetization (in-app purchases/ads/subscriptions) is a plus
• Portfolio of shipped mobile apps (App Store / Google Play links preferred; required)
• English proficiency (B2 or above)

Nice-to-Haves

• Familiarity with backend services such as Firebase or Supabase
• Experience with Jetpack Compose, SwiftUI, and/or performance-focused mobile engineering

Time Commitment & Compensation

• Estimated 10–20 hours/week during active project phases
• Compensation: up to $60/hour equivalent depending on level and pace of contribution