Mobile Engineer - React Native (100% Remote)

About the role

Tether is looking for a Mobile Engineer to build and maintain Keet Mobile, its peer-to-peer chat and calling app for iOS and Android. The app's UI is built with React Native and Expo, while its P2P core runs on the device in a bare worklet. The role is fully remote.

Key responsibilities

• Build and polish features across chat, voice and video calls, media sharing, device pairing and identity backup
• Integrate native platform capabilities such as push notifications, camera, biometrics and background tasks on iOS and Android
• Profile and optimise performance on real devices, including startup time, long chats, media handling, battery and network use
• Write unit and end-to-end tests and help keep releases stable through CI and crash reporting
• Work closely with the core P2P, design and product teams and review code with a high bar for quality

Required profile

• Significant experience with React Native, Redux for state management and Redux-Saga
• Highly proficient in JavaScript and ES6+
• Experience with WebSockets and RESTful APIs
• Knowledge of Swift and Kotlin and familiarity with Xcode and Android Studio is advantageous
• Experience working with a remote team
• Interest in modernising and optimising mobile or web applications