Senior Software Engineer – React Native & Full Stack (MADRID)

Location:
Madrid, Spain

Working Model:
Primarily in-office

Compensation:
$100,000–$150,000 USD base salary + equity

About the Company

Our client is an early-stage fintech company building a general, non-custodial financial application designed to make moving and managing money simple and accessible. The product allows users to remain in control of their funds while spending and transferring money instantly across borders, without having to manage the complexity traditionally associated with crypto or self-custody.

The company has a small, highly technical engineering team that ships quickly and cares deeply about product quality, usability, and customer experience.

About the Role

We are looking for a senior, product-minded software engineer to take ownership of major parts of the product across React Native, backend services, APIs, integrations, testing, and release.

You will own features end-to-end across the React Native application, backend services, APIs, and integrations.





You will work closely with the founders, product, and design teams to move ideas from concept to production. You should be comfortable making pragmatic technical decisions, working without perfectly defined specifications, and owning features from beginning to end.

This is an opportunity to join a small team at an early stage and have a meaningful influence on the product, technical architecture, engineering standards, and company culture.

Key Responsibilities
- Own and ship product features end-to-end across the React Native application, backend services, APIs, and integrations.
- Build major parts of the mobile application across UI, state management, API integration, testing, and release.
- Write clean, reliable, and maintainable JavaScript and TypeScript.
- Build and maintain backend services using Node.js and TypeScript.
- Work directly with founders, product, and design to move quickly from concept to production.
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📌 Senior Software Engineer – React Native (Madrid)
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