Senior Mobile App Developer

Who We Are

Galaxy is a global leader in digital assets and data center infrastructure, delivering solutions that accelerate progress in finance and artificial intelligence. We believe that blockchain and digital asset innovation will transform how value moves through the world – and we’re building the products and services to make that future a reality. Our institutional digital assets platform spans trading, investment banking, asset management, staking, self-custody, and tokenization technology. We also invest in and operate cutting-edge data center infrastructure to power AI and high-performance computing, addressing the growing demand for scalable energy and compute in the U.S. We work at the intersection of finance and technology, helping institutions, startups, and developers navigate a digitally native economy. Led by CEO and Founder Michael Novogratz, our team blends deep crypto expertise with institutional experience and a shared commitment to shaping the future of Web3 and AI. Galaxy is headquartered in New York City, with offices across North America, Europe, the Middle East, and Asia.

What We Value

We are a diverse team of free thinkers, and fast movers united to help investors and creators energize the global economy. We are looking for individuals who thrive in a culture of builders and overachievers and embrace high performance, transparent feedback, and a mission-first approach. Our culture shapes our way of working and gets us where we want to be.

• Seek Excellence.
• Be Selective To Be Effective.
• Be Highly Aligned, Loosely Coupled.
• Disagree Transparently.
• Encourage Independent Decision-Making.
• Build Dream Teams.

Who You Are

This role is a Senior Back End Developer for an exciting new business initiative at Galaxy. In this position, you’ll design, develop, and optimize robust, scalable software back end that powers our web and mobile applications for a new product offering. You will join a team of back-end developers, ensuring the reliability, security, and performance of our platforms while collaborating with front-end, product, and infrastructure teams. Your expertise will help drive the architecture of our product offerings, supporting Galaxy’s mission to innovate in the crypto economy.

What You’ll Do

• Design, develop, and maintain high-performance back-end systems, APIs, and databases that support the business’s web and mobile applications.
• Help foster a culture of technical excellence, collaboration, and continuous learning.
• Collaborate with front-end developers, product managers, and DevOps teams to ensure seamless integration and delivery of features and services.
• Architect scalable, secure, and efficient server-side solutions that meet fintech industry standards and handle high transaction volumes.
• Implement best practices for code quality, testing, and deployment, including code reviews and automated testing frameworks.
• Stay current with emerging technologies and trends in back-end development, blockchain, and fintech to recommend innovative improvements.

What We’re Looking For

• 7+ year of relevant experience
• Strong experience building mobile applications using React Native for iOS and Android
• Hands-on experience working on complex features like dynamic forms, push notifications, deep linking, media upload, offline support, etc.
• Strong knowledge of React Native internals and practical awareness of Android/iOS platform behaviors, bugs, and quirks.
• Ability to debug performance issues using Flipper, Xcode, Android Studio
• Familiarity with Crashlytics, performance monitoring, and agile workflows
• Own code quality and best practices modularity, code reuse, maintainability, and debugging across native boundaries
• Experience shopping apps to Play Store and App Store
• Experience integrating with REST APIs, GraphQL, and third-party SDKs
• Strong and clear communication skills
• Take responsibility and own