Freelance Mobile App Developer (iOS / Android)

Role Overview

Freelance Mobile App Developer for the Tendem project (Mindrift). Build stable, performant, user-friendly mobile applications for iOS and/or Android using native or cross-platform approaches.

Responsibilities

• Design, build, and refine mobile apps across categories (utilities, fitness/wellness, games, productivity, delivery, content)
• Build mobile apps using React Native, Flutter, Swift (iOS), or Kotlin (Android)
• Create responsive UIs following platform conventions (iOS HIG, Material Design)
• Integrate native device features: camera, push notifications, location, storage, biometrics
• Connect apps to backend APIs; implement offline state, caching, and synchronization
• Implement monetization features where needed: in-app purchases, ads, subscriptions
• Debug, optimize, and refactor code for correctness, performance, battery efficiency, and maintainability
• Resolve 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 shipping iOS and/or Android apps
• Strong knowledge 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 app submission
• Ability to work independently and ship complete features end-to-end
• Portfolio of shipped mobile apps (required; App Store / Google Play links preferred)
• English proficiency B2 or above

Nice-to-Haves

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

Logistics & Compensation

• Part-time / remote; estimated 10–20 hours/week during active phases
• Compensation up to $60/hour equivalent, depending on level and pace