About Our Client One of our clients is building the next generation of integral finance. They're creating a mobile-first platform that makes moving, spending, and managing money across borders as simple as using a traditional bank account - while leveraging cutting-edge blockchain technology behind the scenes. Users enjoy a seamless experience without ever needing to understand crypto.
The company already serves thousands of customers across 130+ countries and is rapidly expanding its presence in the US market. Having recently secured $5M in seed funding from leading international investors, they're well-funded and entering an exciting growth stage.
With a lean, highly technical team, every engineer has a direct impact on both the product and the company's future.
You'll own major parts of the React Native application—from designing beautiful user interfaces to state management, API integrations, testing, and production releases. While React Native will be your primary focus, you'll work across the stack whenever needed.



If you love building polished consumer products and enjoy solving complex technical challenges, you'll feel right at home.
Build and own major features of the React Native app end-to-end.
Develop clean, scalable JavaScript and TypeScript code.
Debug and solve complex issues across iOS, Android, APIs, and backend integrations.
Optimize performance, animations, responsiveness, and overall user experience.
5+ years of professional software engineering experience.
~ Strong experience building and shipping production React Native applications.
~ Expert-level JavaScript and TypeScript skills.
~ A product mindset and passion for delivering exceptional user experiences.
~ Backend or full-stack experience (Node.js, APIs).
Web3, blockchain, or Solidity experience (nice to have, not required).
Previous experience at an early-stage startup.

📌 Senior React Engineer (España)
🏢 OnHires
📍 España