Mobile Engineer - React Native (100% Remote)

Tether; Ticino; Hybrid; CHF 120,000 - 150,000; Full time

Job summary

Tether Ltd. is hiring a mobile software engineer to develop and maintain Keet Mobile for iOS and Android using React Native and Expo. You’ll own features end to end, from UI to integrating the P2P core APIs.

You will collaborate with remote teams across product, design, and core P2P engineering, write tests, and help optimize startup time, battery usage, and network efficiency. Experience with Redux, Redux-Saga, and native iOS/Android knowledge is preferred.

Qualifications

• Significant experience with React Native, Redux, and Redux-Saga.
• Strong JavaScript (ES6+) skills and familiarity with WebSockets and REST APIs.
• Knowledge of native iOS/Android capabilities (Swift/Kotlin) is a plus.
• Experience working with remote teams.
• Proactive in modernizing and optimizing mobile/web apps.

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 both 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.

Skills

React Native

Redux

Redux-Saga

JavaScript

WebSockets

REST APIs

Swift/Kotlin

Remote teamwork

Tools

Expo

Xcode/Android Studio

Job description

Join Tether and Shape the Future of Digital Finance

At Tether, we're not just building products, we're pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction.

Innovate with Tether

Tether Finance: Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.

But that’s just the beginning:

Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.

Tether Data: Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.

Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.

Tether Evolution: At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways.

Why Join Us?

Our team is a global talent powerhouse, working remotely from every corner of the world. If you're passionate about making a mark in the fintech space, this is your opportunity to collaborate with some of the brightest minds, pushing boundaries and setting new standards. We've grown fast, stayed lean, and secured our place as a leader in the industry.

If you have excellent English communication skills and are ready to contribute to the most innovative platform on the planet, Tether is the place for you.

Are you ready to be part of the future?

About the job

In this role, you will develop and maintain Keet Mobile, our peer-to-peer chat and calling app for iOS and Android. Keet Mobile is built with React Native and Expo, and its P2P core runs on the device itself in a Bare worklet. You'll own features end to end, from UI/UX implementation to using the P2P core apis.

You will:

• 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, bio-metrics and background tasks on both 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

• Significant experience with React Native, Redux for state management and Redux-Saga
• Highly proficient in JavaScript and ES6+.
• Experienced with WebSockets, RESTful based APIs.
• Knowledge in native languages (Swift/Kotlin) and familiarity with native build tools (Xcode/Android Studio) is advantageous.
• Experience working with a remote team
• Interested in modernizing and optimizing different mobile or web applications.
• Bonus points if you have any built something amazing on any p2p frameworks .