Senior Mobile Engineer, CoinDesk Media

About Bullish

Bullish is an institutionally focused global digital asset platform that provides market infrastructure and information services. These include: Bullish Exchange – a regulated and institutionally focused digital assets spot and derivatives exchange, integrating a high-performance central limit order book matching engine with automated market making to provide deep and predictable liquidity. Bullish Exchange is regulated in Germany, Hong Kong, and Gibraltar. CoinDesk Indices – a collection of tradable proprietary and single-asset benchmarks and indices that track the performance of digital assets for global institutions in the digital assets and traditional finance industries. CoinDesk Data - a broad suite of digital assets market data and analytics, providing real-time insights into prices, trends, and market dynamics. CoinDesk Insights – a digital asset media and events provider and operator of Coindesk.com, a digital media platform that covers news and insights about digital assets, the underlying markets, policy, and blockchain technology.

Reports to:

Director, Engineering, CoinDesk

The Opportunity

Are you passionate about building exceptional mobile experiences that connect millions of users to the world of cryptocurrency and digital assets? We're looking for a Senior Mobile Engineer with expertise in React Native and Expo to develop CoinDesk's next-generation mobile application. You'll be working on the CoinDesk mobile app that serves crypto enthusiasts, traders, and industry professionals who need immediate access to market-moving news, price alerts, and comprehensive market analysis. This includes building robust mobile features, developing engaging user experiences, and ensuring optimal performance across iOS and Android platforms. If you love crafting exceptional mobile experiences, enjoy tackling complex technical challenges, and want to make an impact in the rapidly evolving crypto and media space, we'd love to hear from you.

Note: This position is based in NYC and will be required to work from our office located near Union Square three (3) days per week.

What You'll Do:

• Build and maintain the CoinDesk mobile application using React Native and Expo, delivering real-time crypto market data, news, and interactive features to millions of users across iOS and Android.

• Develop highly performant and stable mobile experiences capable of handling real-time market data streams, push notifications, and complex user interactions.

• Collaborate with product teams to implement user-centric features, optimize app performance, and ensure the mobile experience aligns with CoinDesk's brand and user expectations.

• Design and integrate mobile-optimized APIs and work with backend systems to ensure seamless data flow between mobile clients and server infrastructure.

• Implement comprehensive testing strategies including unit, integration, and end-to-end testing to ensure app reliability and reduce production issues.

• Monitor and improve app stability using crash reporting, performance monitoring, and user analytics to proactively identify and resolve issues.

What You Have:

• Hands-on mobile development expertise with React Native for building cross-platform applications.

• Strong knowledge of automated testing practices including experience writing unit, integration, and end-to-end tests using frameworks like Jest, Testing Library, Detox, or Playwright.

• Familiarity with CI/CD pipelines and experience integrating testing and deployment processes into GitHub Actions or similar platforms.

• Experience with debugging and improving app stability using tools like DataDog, Sentry, Firebase Crashlytics, or similar platforms to track crashes and performance issues.

• Experience working with REST APIs and backend systems including the ability to debug endpoints and collaborate effectively with backend teams.

• Strong communication and collaboration skills with the ability to work cross-functionally while proactively contributing to technical discussions.

• Proactive mindset w