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 build!You’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 (or serious curiosity) around shipping AI features.You can explain a complex technical decision in English to someone who doesn't write code clearly, without condescension.You'll spend more time designing systems than writing syntax. That means breaking down complex tasks, defining architecture, and writing high-level prompts that instruct multi-agent systems to generate the underlying code.How We Work ð» (Barcelona or Madrid Office)At Factorial, we believe the best products are built when people come together, in person to collaborate, challenge ideas, and move fast.

That’s why our Engineering Teams follows an office-first, adaptable approach.However, we also understand the importance of focus and flexibility, so we support remote work when it makes sense - whether for deep work, personal needs, or just a change of scenery.This balance helps us stay agile, creative, and closely connected, while giving everyone the space to do their best work.Our Hiring ProcessIntro Call Chat with our Talent Partner about your journey and goals.Final Coffee Chat A relaxed conversation with our CTO & VP of Engineering to explore our vision, culture, and your growth.The whole process is remote, using videoconferencing tools!About Factorial ðAt Factorial, we’re building the leading AI Business Management Software for companies of all sizes. Our platform centralizes key workflows across HR, Finance, Talent, Operations, and IT, freeing teams from manual processes so they can focus on what really matters: leading, growing, and taking care of their people.Our ValuesWe own it: We take responsibility for every project. We're dedicated to learning something new every day and, above all, share it.Perks of being part of Factorial ðHigh growth, multicultural and friendly environmentAlan as private health insuranceHealthy life with Wellhub (Gyms, pools, outdoor classes)Save expenses with CobeeLanguage classesBreakfast in the office and organic fruitFood discounts with NoraPet FriendlyMuch more that we'll spill during the interview process!

📌 Senior Product Engineer - Finance Domain (Barcelona)
🏢 Factorial Hr
📍 Barcelona