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

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 are 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 & Integrations team addresses particular challenges at Factorial. We sit at the intersection between product and platform.



We own product surface while we also design developer experiences for internal and external developers of integrations.

We build tools for Factorial product teams to publish in our extensive public API.

We build an integrations framework to achieve the best user experience and developer experience when using integrations. Several Factorial products already use this framework, and we keep expanding it.

We enable our developer partners to extend Factorial and live the best developer experience. With the acquisition of YepCode, we’re laying the groundwork to bring AI further into how we build integrations.

What You’ll Do
As an engineer on the API & Integrations team, your main focus will be owning the development of our public API and integrations framework end‑to‑end, from problem definition and system design to shipping, monitoring, and iteration in production.

Own systems end‑to‑end from

📌 Staff AI Engineer (Barcelona)
🏢 Factorial
📍 Barcelona