Leadtech in Barcelona is seeking a Senior Product Engineer to build a multiplatform AI-powered document system. You will own features end-to-end, from React frontends to Node.js/Express backends. The role emphasizes collaboration, user feedback, and innovative AI integration.

Ideal candidates have 2–5 years of experience, proficiency in Python, TypeScript, and React, and a business-aware mindset. Enjoy flexible remote work, competitive pay, and comprehensive benefits, including 25 vacation days and private health insurance.