Senior Software Engineer, Platform; Mobile

About the Company

Gemini is a global crypto and Web3 platform founded by Cameron and Tyler Winklevoss in 2014, offering a wide range of simple, reliable, and secure crypto products and services to individuals and institutions in over 70 countries. Our mission is to unlock the next era of financial, creative, and personal freedom by providing trusted access to the decentralized future. We envision a world where crypto reshapes the global financial system, internet, and money to create greater choice, independence, and opportunity for all — bridging traditional finance with the emerging cryptoeconomy in a way that is more open, fair, and secure.

As a publicly traded company, Gemini is poised to accelerate this vision with greater scale, reach, and impact.

Our Platform organization’s purpose is to enable Gemini to scale effectively and empower our engineering teams to focus on building innovative financial products and experiences for individuals around the world. Platform focuses around building a scalable and secure foundations platform, enabling Engineering to deploy, validate, and operate their services in production, improve resiliency of the service and increase organizational efficiency by reducing operational toil and increase system efficiency through architectural evolution.

The Client Platform team provides a horizontal function that supports and maintains core client development for web and mobile, testing infrastructure, frontend CI/CD pipeline development, maintaining and expanding usage of our foundational design system library, and providing standards for future client development. The team’s mission is to be the force multiplier for other client teams so that they can deliver with quality and speed.

You will be a core part of leading Gemini’s mobile client development platform, both by contributing to and adopting modern tooling for the mobile client from both a client architecture and its CI process, working cross-functionally across Gemini’s engineering teams to influence, and improve our development practices and culture.

This role is required to be in person twice a week at either our San Francisco, CA or New York City, NY office.

• Collaborate with cross-functional teams design, develop, and deliver high-quality mobile applications.
• Lead architectural initiatives to enhance app performance, scalability, and reliability.
• Establish and advocate for best practices in mobile development, code quality, and security standards.
• Develop efficient and reusable UI components while ensuring maintainability and reliability.
• Scope and independently implement features, making informed design and engineering decisions.
• Continuously monitor app performance, utilizing observability tools to identify and resolve issues.
• Improve developer experience through scalable app architectures and refined development processes.
• Conduct meaningful code reviews and mentor team members to foster technical growth and innovation.
• Partner with stakeholders to define and execute on architectural rollout strategies.
• Stay updated on industry trends, tools, and technologies to incorporate best practices into the development process.
• Address cross-team engineering challenges, contributing to the overall growth and success of the organization.

• 4+ years of experience in mobile development, including 2+ years with React Native, building scalable mobile applications.
• Proficient in JavaScript/Type Script and capable of working with native mobile platforms (Swift/Objective-C and/or Java/Kotlin) as needed.
• Expertise in React Native, navigation libraries (especially React Navigation), life cycles, state management, and performance optimization.
• Demonstrable experience in debugging, framework migrations, refactoring, and adopting mobile best practices.
• Familiarity with CI processes (e.g., Git Hub Actions) and automated testing (unit, integration, and end-to-end).
• Able to quickly debug and address mobile performance related issues.
• Knowledge of mobile best practices and stay informed about innovations in the mobile industry and have the ability to…