We're hiring an engineer to help us build AI into the core of our HR platform — not as a feature add-on, but as a fundamental part of how the product works.
You'd build AI-driven workflows that change how users interact with Factorial. This means designing systems where AI handles routine decisions while humans stay in control of judgment calls, creating evaluation frameworks so we know when our LLM features actually work, and building the underlying infrastructure that lets other teams ship AI features safely.
You'll own problems from start to finish: figuring out what to build, designing it, shipping it, then improving it based on what we learn.
We're using skill-based agents and protocols like MCP. You'd work closely with product, design, and engineering teams — and have real influence on how we hire and develop engineering talent going forward.
This is a hands-on role. You'll ship code, not just give advice.
You care more about outcomes than stack debates. You think in terms of end-to-end user flows and system behavior, not rigid frontend/backend boundaries.
You already use AI as a coding partner — not occasionally, but as part of your daily work. You know how to leverage it to multiply your impact while keeping your judgment and craft central.
Your goal is building great products that have real impact, not writing the most lines of code.
Most companies are still figuring out how to bolt AI onto existing products. We're rebuilding from the assumption that AI is already here. If you want to work directly with leadership on defining what that looks like in practice in a real product used by thousands of companies — let’s talk.
Our engineering team is in the office 80% of the time. We've found that building this kind of product works better when people can work together in person as it gives us faster alignment, better collaboration, fewer misunderstandings, and we invest a lot into people-first culture.
The other 20% is flexible. Work from home when you need extra focus time, have personal things to handle, or just a change of scenery.
€86,000–€140,000/year based on what you can actually do rather than years of experience. We also cover:
Private health insurance (Alan)
Gym/fitness membership (Wellhub)
Expense management tool (Factorial Benefits)
Language classes (Preply)
Salary advances when needed (Payflow)
Breakfast and fruit at the office
Pet-friendly office
We have people from 43+ countries on the team. Apply however works for you — standard resume, blind resume, with pronouns, with a cover letter, whatever.
Even though we used LLMs heavily to write this position, all em dashes were placed by hand by a real person.
The business software to manage your whole team.
With over 14.000 clients worldwide in more than 95 countries, Factorial is one of the leading business management softwares for SMEs. We provide intuitive solutions that automate and centralize administrative tasks to provide insights and help your business run smoothly.
Factorial was founded in 2016 in Barcelona and experienced quick growth due to the fact that so many businesses face the same challenge: wasting time on never-ending manual tasks. A few years later, in 2022, Factorial became a Unicorn, propelling us forward to continue on our mission of providing your business with a one-stop-shop solution for all people processes.
Factorial offers solutions like time management, talent management, recruitment, expenses, analytics, document management to name a few. Our all-in-one, user friendly platform makes it easier for businesses to focus on matters, the people within it.
