Product Owner - Mainloop

About the role

Mainloop is a new engineering team inside an international group, based in Barcelona and built from scratch this year. It develops software that automates professional-services work such as forms, approvals and reconciliations, serving businesses across roughly fifteen countries. The Product Owner owns the product end to end: the relationship with the business, the backlog, acceptance and adoption, with one developer as partner. The role is open-ended, with the way product ownership works in the team shaped by the first Product Owner.

Key responsibilities

• Own the product and the relationship with the business, gathering needs and deciding what to build, in what order and what to decline.
• Write precise specifications, rules and acceptance criteria that guide AI agents and developers.
• Accept or reject delivered work by checking it against the agreed criteria.
• Drive adoption and measure outcomes such as time saved, error rate and uptake.
• Carry a portfolio of products, each with its own developer and business.

Required profile

• Has owned a real product, platform or module in production and can explain the key decisions made.
• Interested in how businesses work and in processes.
• Precise writer, able to say no to senior colleagues with a reasoned argument.
• Uses AI seriously for prototyping and analysis, and reads AI-generated work critically.
• Comfortable with engineers; fluent English, Spanish is an advantage.
• Willing to travel regularly to the businesses served by the products.

What we offer

• Relocation support: flights, first month's accommodation, visa and paperwork costs handled by an agent, and a relocation bonus paid on arrival.
• Healthcare with no premium, deductible or network from day one.
• Thirty calendar days of holiday plus fourteen public holidays.
• No on-call duty and no hours counted.
• Claude Max subscriptions and tools for AI work.
• A Mainloop Barcelona certificate awarded after two to three years for those who can run products the team's way.

Hiring involves four rounds: a short conversation with the hiring manager, a deeper interview, a conversation with the Casablanca team, and a working session with a real product and stakeholder.