We're looking for a Staff Software Engineer to help build AI-native features into Factorial's product. We're looking for a Staff Software Engineer to help build AI-native features into Factorial's product. You'll be writing Rails and React, designing systems, and shipping product hand in hand with Product and Design. "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 solid depth in both backend and frontend software engineering You understand APIs, cloud platforms (AWS, Azure, or GCP), and system design well This is about building with AI, not training or fine-tuning models You're seen as a technical and cultural leader, and you hold the bar high You push back on process that doesn't serve the team, from hiring to deployment You communicate clearly in English; Spanish is a plus As a Staff Engineer, you'll set technical direction for meaningful chunks of the roadmap, not just execute against it. This isn't occasional collaboration, it's a tight, ongoing partnership.

📌 Staff Software Engineer (La Coruña)
🏢 Factorial
📍 La Coruña