Factorial is hiring a Fullstack Engineer in Barcelona to build scalable user experiences and customer-facing portals. You'll work in a collaborative environment with a team of over 250 developers, using Ruby on Rails and React. The role involves designing systems that integrate internal platforms while improving user interactions. Idóneo candidates have 5+ years of backend or full-stack experience, strong skills in API development and user experience with a focus on reliability. Join us to contribute to cutting-edge business management technology.