Product Engineer - AI Business Management Software

About the role

Factorial, an AI platform for business management founded in Barcelona in 2016, is hiring a Product Engineer in Madrid. The team builds AI-integrated features such as LLM-powered workflows and agentic tools that help finance teams work faster, and the engineer takes ownership of features end to end, from understanding the problem to checking results in production.

Key responsibilities

• Ship features end to end, from understanding the problem to writing the code and verifying it in production.
• Work alongside experienced engineers on AI-integrated systems: LLM-powered workflows, agentic features and tools for finance teams.
• Learn how to evaluate AI features in production, prioritising reliability and user impact over model complexity.
• Take ownership of outcomes and ask questions about the why behind features.

Required profile

• 1 to 4 years of software engineering experience, comfortable working across the stack.
• Curious about AI and interested in how these systems work, beyond just using them.
• Outcome-oriented: cares whether the work built actually helped and is willing to fix it if it did not.
• Clear communicator and collaborative teammate.

Required skills

• Comfortable, or eager to become comfortable, with Ruby on Rails and React.
• Ability to work across the stack.

What we offer

• Office-first, flexible approach: on-site several days a week, with remote work supported when needed.
• Private health insurance (Alan) and gym access via Wellhub.
• Language classes, breakfast in the office and food discounts.
• A career path with defined levels and salaries shared early in the process.

The hiring process is remote: intro call, hiring manager interview, live technical challenge and final coffee chat with the CTO and VP of Engineering.