This position is at Factorial The selection process will be entirely managed by Factorial.
-- Hello
Do you want to help us build the platform that connects Factorial to the rest of the software world , with strong engineering foundations today and AI as a growing part of how we work tomorrow?
We're looking for engineers who: Care about the maturity and quality of what they ship, more than the specific stack they use Care about whether the thing they built actually worked — not what their title says Ready to be part of the challenge?
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About the team ?
Our Engineering team is the engine behind Factorial, crafting the tech that makes HR simple, fast, and reliable for thousands of companies.
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 a Business Management solution that actually works for the people using it.
Our core stack is Ruby on Rails and React, though we're open to engineers from other stacks — what matters most to us is the maturity of your development practice.
The API the language itself doesn't matter, what matters is having gone through that kind of architectural challenge.
How We Work ?
(Barcelona 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 follow an office-first, adaptable schedule .
We work on-site several days a week , using that time to connect, align, and innovate as a team.
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.
At Factorial we don't evaluate you by years of experience but by your knowledge and skills.
We use our Career Path with a rubric framework where we define what is expected for each experience level and skill.
This framework allows you to know your current level and what you need to keep growing.
We love transparency, so our Career Path includes the salaries for each level, which we share during the first interview to ensure alignment.
Our Hiring Process Intro Call ? Chat with our Talent Partner about your journey and goals.
Hiring Manager Interview ? Deep dive into your product mindset, teamwork, and problem-solving.
Live Challenge ? A collaborative technical exercise based on real-life problems.
Final Coffee Chat ? A relaxed conversation with our CTO

📌 Staff Ai Engineer (Barcelona)
🏢 Factorial
📍 Barcelona