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? Join us as a Founding Engineer in a brand-new Factorial spinoff It's ambitious, and that's the point. But this isn't an internal project.

It's a spinoff with its own identity, its own pace, and its own team. That said, strong Ruby on Rails experience on the backend and solid React or TypeScript on the frontend will go a long way. If you've ever wanted to work in a small, scrappy team with the energy of an early‐stage startup but without the typical early‐stage uncertainty, this is that opportunity.

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.

You have an entrepreneurial mindset and genuinely enjoy the early stage of building something from scratch. ~ 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 will review code daily and get feedback on your own code at every pull request, from all team members, including juniors. You will learn from the entire team, both on technical topics (performance, architecture...) and core skills, in an environment driven by engineering quality.

You will also mentor junior team members and help them learn from your experience.

How We

Work (Barcelona Office) That's why our Engineering Teams follows an office‐first, adaptable schedule. 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.

Intro

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! At 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.

We own it: We take responsibility for every project. We're dedicated to learning something new every day and, above all, share it. Alan as private health insurance Save expenses with Cobee Breakfast in the office and organic fruit

📌 Software Developer Engineering · · Fully Remote (Barcelona)
🏢 Factorial Hr
📍 Barcelona