Senior/Staff/Principal Platform Back-End and Platform Front-End Engineers – New York – On-Site – Opportunity to join one of the Fastest-Growing and Well-Known Fin-Tech Start-Ups in NYC

Senior/Staff/Principal Platform Back-End and Platform Front-End Engineers – 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 Platform Back End and Platform Front-End Engineers of all levels!

You will assist with the continuous expansion and optimization of their services in a frontier space.

This is an excellent opportunity for an experienced Platform Software Engineer, looking to join an ambitious start-up, to take the next step into a challenging position with a company offering significant growth potential.

About the Company:

• Valued at over $11bn 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 Platform Back-End and Platform Front-End Engineer Vacancies:

Back-End:

In addition to coaching and mentoring junior resources and working with other team members and stakeholders, your duties will include designing, deploying, and documenting the back-end services for the website and mobile app.

Additionally, you will promote best practices, guarantee that integrations are technically feasible, and optimise the application for optimal speed, scalability, and dependability.

• Propose and enhance automation initiatives related to infrastructure as code, CI/CD, monitoring and alerting

• Contribute to all phases of the development lifecycle

• Write well-designed, testable, and efficient code

• Become a foundational member of their team, working alongside the Head of Engineering and Head of Product

Front-End:

In order to develop user-facing features, you will work directly with the frontend engineering and product teams across the React/JavaScript stack

• 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 Platform Back-End and Platform Front-End Engineer Vacancies:

- 6+ Years of Experience

- Back-End: Any language, good Platform experience

- Front-End: 6+ years of React experience

- Platform 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 [email protected]