OverviewWe are building a new startup inside Factorial, aiming to scale from 0 to 10 million in under a year. The new spinoff focuses on rethinking how companies manage workflows, org charts, policies, and analytics—core operational facets of Factorial’s platform. As a Founding Engineer, you will join at day zero, working closely with a small, high‑energy team that values speed, decision‑making with incomplete data, and building products people actually use.

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Key Responsibilities
- Lead the design, development, and delivery of AI‑powered features for the IT Management domain, including onboarding, permissions, support, and equipment management.
- Own the full lifecycle of features—from hypothesis, to build, to deployment, measurement, and iteration.
- Conduct customer calls to understand pain points and translate them into product requirements.
- Review and mentor code daily, providing constructive feedback to all team members,



including juniors.
- Collaborate with the product team to set quarterly goals and roadmap, focusing on technical readiness and alignment with business objectives.
- Advise teammates on transitioning from deterministic to probabilistic AI models, ensuring outputs can be reasoned about and acted upon.
- Ensure scalable, cloud‑native integration of AI models with a Ruby on Rails backend and a React/TypeScript frontend.
- Get involved in architectural decisions concerning agentic workflows and LLM trade‑offs.
- Participate in recruiting, interview, and mentoring processes to grow the engineering team.

Qualifications
- 4+ years of software engineering experience, preferably with a track record of shipping AI features.
- Strong experience in Ruby on Rails and React or TypeScript.
- Proficiency in building and maintaining scalable backend services, integrating AI models, and ensuring reliability.
- Hands‑on

📌 Senior Product Engineer (Barcelona)
🏢 Factorial Hr
📍 Barcelona