Lead Product Engineer / CTO

Build software that hundreds of thousands of people use every month, all over the world. At Loopia you own the whole product, pick your own tools, and ship to real customers fast. We make white-label trade-in and resale technology, and we want one engineer to take it end to end, from the code to the customers who depend on it.

Tasks

You own the product end to end. The parts customers touch, the logic underneath, the integrations into our partners systems, and whatever it takes to keep it running. What you focus on shifts with the business, often week to week.

How we work

Use the tools you want. We will not tell you which editor, model, or framework to reach for. We care about what ships and whether it holds up in production. The agentic tooling moves fast, and we expect you to keep up, to know which model and harness is right this week, and to switch when something better shows up.

We trust customers more than opinions, so we ship early and learn from real feedback. You get a lot of responsibility fast and rarely wait on anyone.

We believe being in the same room is one of the biggest drivers of speed. We are hybrid, not remote, and we want you in the Zürich office regularly, because the best and fastest work happens when we are together.

Requirements

• Product sense. You can tell a feature that sounds good from one that moves the needle for a customer.
• Customer fluency. We can put you in front of a partner and trust the outcome.
• Strong technical and architecture instincts, prior software engineering experience.
• Founder-like personality. You take ownership, move fast, and do whatever it takes to get the right outcome, including picking up non-obvious work outside your role.
• A real system for agentic development. Opinions on context, prompting, tool design, evaluations, and shipping AI safely and reliably.
• You believe AI is changing how software gets built, and you act on it.
• Curious by default. You run the experiment, learn from what comes back, and build on it with the people around you.
• Open to strong juniors who are deep into the topic. If that is you, send reference projects.
• Nice to have: German, a retail or e-commerce background, ERP integration experience, interest in circular economy.

Benefits

• Real customers using your work from week one.
• We are building infrastructure for the circular economy.
• Equity. A senior role with a real stake in the company.
• A small senior team, with direct exposure to founders and customers.
• Zürich base, hybrid. Full-time.

Send your CV and something you have built: a repo, a demo, or a write-up of how you use agents. Applications that include a motivation letter get priority.

Loopia is the software platform for companies that buy back, refurbish, and resell used products. We help retailers and brands turn secondhand into a real business: more margin, stronger customer loyalty, and a meaningful contribution to the circular economy.

Our customers run their secondhand operations on Loopia across Europe and beyond. We are award-winning, growing fast, and based in Zürich.

Every product that finds a second life is a small win for the climate. Our software makes that scalable.