Do you want to help us redefine how AI powers the future of Business Management software, not as an add-on, but as a core part of how people work, decide and grow?ðAs a Product Engineer you’ll help us support and scale our AI- Driven Finance Domain to the next level. We want people who are curious about why a feature exists, not just how to build it. If you love solving hard problems and want to build something that truly matters, come build it with us.We're a team of 200+ Product Engineers building Business Management solution that actually works for the people using it. Our core stack is Ruby on Rails and React but the interesting work right now is what we're building on top of that: agentic workflows, LLM-integrated features, systems that behave probabilistically rather than deterministically.Finance is one of the fastest-growing domains at Factorial. Its mission is to be the financial backbone of the companies we serve, handling everything from expenses and invoices to payments, cards, accounting,



and analytics so that teams can stop chasing paperwork and processes and focus on the decisions that actually move their business. We're extending our banking-as-a-service platform so companies don't just pay with cards and transfers but also get paid, through products like accounts receivable. And we're turning Finance into an engine for cost reduction: planning headcount, policing spend, catching anomalies in invoices and contracts before money goes out, and surfacing the true cost of projects to protect margins. It's a domain where the work has a direct, measurable impact on every company that uses us and where there's a lot still to buildYou’re comfortable working with Ruby on Rails & React and understand how to integrate AI models into scalable, cloud-native environments.You help teammates who are transitioning from deterministic to probabilistic thinking, not by lecturing, but by working through it together.4+ years in software engineering, with some track record

📌 Senior Product Engineer (Barcelona)
🏢 Factorial Hr
📍 Barcelona