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