Part 2
Tech Lab
Full-Stack Product Engineer
Own a product end to end — the users, the roadmap, the build and the release — with nobody standing between you and the people who use it.
BarcelonaOpen5 seats
What you own
01 The users, in person02 What gets built next, and why03 The build, front to back04 Whether it gets used
One method, many products
Mainloop is anengineering company in Barcelona. We own what we build and we answer to ourselves. You get the interesting part of a new company, with a real customer and real products from day one.
What we build is the software that automates professional-services work — across roughly fifteen countries, for businesses that are drowning in process. We work in two halves. One half goes into a business, works out what actually happens there, and proves fast whether an idea is worth having. The other half — this half — takes what is proven and owns it for years.
This is the seat where the product and the engineering are the same job.
Most of our products are run by a pair: a Product Owner who holds the business,



and an engineer who holds the build. Some of them do not need two people. They are smaller, their users sit close enough to talk to directly, and a separate PO would be a relay rather than a help. Those products are run by one person, and that person is you.
What the job actually is
You own a product end to end. Not a slice of it, and not the tickets someone else wrote about it.
You decide what it should do next, you build it, you ship it, and you find out whether it worked.

You talk to the people who use it. In person when you can. You read the feedback, you watch how the product is really used, and you notice the workaround nobody thought to mention — because the workaround is usually the next feature.
You decide what comes next. There is no one above you writing the roadmap for your product and no one below you writing the stories. You choose what moves the outcome, what waits, and what you decline — with a reason t

📌 Full-Stack Product Engineer (Barcelona)
🏢 Mainloop AI
📍 Barcelona