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# Senior Fullstack Engineer, Repayments UX (Remote Europe)

- **Company:** Affirm, Inc.
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** Python (Programming Language), Web Application Frameworks, Backend, Kotlin, React Native
- **Published:** October 30, 2026
- **Apply:** https://www.jobleads.com/es/job/senior-fullstack-engineer-repayments-ux-remote-europe--comunidad-de-madrid--e7dc02e09a46902cd9ab091ba2b024d38

## About the Role

The role requires 4+ years of experience with React Native and web frameworks, plus backend skills in Python or Kotlin. We offer equity, health coverage, stipends, and visa sponsorship for Spain-based hires.

## Description

Affinist, a remote-first company operating across Europe, seeks a Senior Full-Stack Software Engineer for the Repayments UX team. You will own quarterly goals, guide engineers, and drive scalable features across web and mobile platforms.

The role requires 4+ years of experience with React Native and web frameworks, plus backend skills in Python or Kotlin. We offer equity, health coverage, stipends, and visa sponsorship for Spain-based hires.