Mobile Engineer – React Native

Tether.to

. Develop and maintain Keet Mobile, a peer-to-peer chat and calling app for iOS and Android .

Posted 10/14/2026full-timeRemote • SwitzerlandMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Proficient in developing and maintaining mobile applications using React Native, with a strong focus on performance optimization and feature integration. Capable of collaborating with cross-functional teams and ensuring high-quality code through rigorous testing and review processes.

Highest-signal resume keywords

React Native DevelopmentJavaScript ProficiencyRedux State ManagementWebSockets and RESTful APIsMobile Application Optimization

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

React NativeJavaScriptES6+ReduxRedux-SagaWebSocketsRESTful APIsUnit TestingEnd-to-End TestingPerformance Profiling

Soft Skills

Excellent English CommunicationRemote Team Collaboration

Tools & Technologies

XcodeAndroid Studio

Industry Keywords

Peer-to-Peer FrameworksMobile Application DevelopmentIOS DevelopmentAndroid Development

Tech Stack

Tools & technologies

AndroidiOSJavaScriptKotlinReactReact NativeReduxSwift

About the role

Key responsibilities & impact

Develop and maintain Keet Mobile, a peer-to-peer chat and calling app for iOS and Android
Build and polish features for chat, voice and video calls, media sharing, device pairing, and identity backup
Integrate native platform capabilities including push notifications, camera, biometrics, and background tasks on iOS and Android
Profile and optimize performance on real devices, including startup time, long chats, media handling, battery use, and network use
Write unit and end-to-end tests
Help keep releases stable through CI and crash reporting
Work closely with the core P2P, design, and product teams
Review code with a high bar for quality
Own features end to end, from UI/UX implementation to use of P2P core APIs

Requirements

What you’ll need

Significant experience with React Native, Redux for state management, and Redux-Saga
Highly proficient in JavaScript and ES6+
Experience with WebSockets and RESTful APIs
Experience working with a remote team
Interest in modernizing and optimizing mobile or web applications
Knowledge of native languages such as Swift or Kotlin is advantageous
Familiarity with native build tools such as Xcode or Android Studio is advantageous
Experience with peer-to-peer frameworks is a bonus
Excellent English communication skills
Ability to work remotely from a specified country

Benefits

Comp & perks

100% remote work
Global, remote-first team environment
Opportunity to collaborate with experts in fintech and blockchain
Work on innovative digital finance and peer-to-peer technology products