Senior/Staff/Principal Mobile (React Native) Developer

Senior/Staff/Principal Mobile (React Native) Developer - New York - On-Site - Opportunity to join one of the Fastest-Growing and Well-Known Fin-Tech Start-Ups in NYC This young and agile company, building a cutting-edge commerce network is currently seeking Mobile React Native Developers of all levels with start-up experience. You will assist with the continuous expansion and optimization of their services in a frontier space. This is an excellent opportunity for an experienced Mobile Engineer with start-up experience to take the next step into a challenging position with a company offering significant growth potential. About the Company: Valued at over $10bn having raised over $250m in their Series B funding in 2025. Launched in the 2020's, this is phenomenal growth Their network has already reached more than 4.5 million people They have already acquired some smaller Fintechs They launched their new product in 2026 About the Senior/Staff/Principal Mobile (React Native) Engineer Vacancies: In order to develop user-facing features, you will work directly with the frontend engineering and product teams across the React Native mobile app. • Write well designed, testable, efficient code • Identify opportunities to refactor and make features more robust • Coordinate with QA to test new features • Be responsible for writing unit and integration tests • Work together with the backend team to come up with requirements for an API Ideal Requirements for the Senior/Staff/Principal Mobile (React Native) Engineer Vacancies: - 3+ years of React Native experience - 6+ years of React experience - Proven experience in React Native, TypeScript/JavaScript, Redux/Global state management frameworks - Strong UX design skills, problem solving, and troubleshooting skills. - Understanding of how to optimize the delivery of code and assets to a browser or device - Ability to articulate the benefits and challenges of depending on front-end libraries, frameworks, and tool-sets - Ability to write testable code - Start-Up Experience - nice to have Apply to the Role: Roles like these are snapped up very quickly, so act now if you do not want to miss out! Reply to this advert or email your CV to Apply for this role