Product Engineer

About Guzco

Guzco builds the infrastructure European e-commerce merchants use to detect, prevent and resolve fraud, chargebacks and payment disputes before they become financial losses.

Every payment method, card network and carrier has its own evidence requirements, formats and deadlines. A merchant selling via Klarna, PayPal, Mastercard, Visa and Amex is facing a different rulebook for each one. Most merchants write the losses off, not because the cases can't be won, but because responding correctly at that volume is impossible by hand.

We connect directly to payment providers, shop platforms, carriers and returns systems, turn fragmented order data into structured evidence, and file representments automatically inside each provider's deadline. Existing tools were built for US card flows and don't take the work over end to end.

Guzco is backed by investors with deep payment and e-commerce knowledge, works with merchants across Europe, and is based in the centre of Amsterdam.

About the role

As one of our first engineers, you own the technical direction of the company. You build and scale the core product, make the architecture decisions that determine how far we can go, and hire the engineering team around you.

This is a role for a senior engineer who can push both a product and a team to the next level, with real founder-level ownership from day one.

Concretely, you will:

• Find the highest-value problems by talking directly to merchants, our ops team and payment partners.
• Build features end to end, from PSP and platform integrations to the logic that decides what gets filed and when.
• Design automation that runs against hard external deadlines, where a missed window is a lost case and money out the door.
• Measure what you ship in recovered euros and win rates, and iterate on what the numbers tell you.
• Decide what not to build as confidently as what to build.
• Help shape the architecture alongside the founders as the product grows.

Our stack is backend-heavy: managed services on GCP including Airflow and BigQuery, Postgres, and a server-side rendered web application. You will have room to change what does not serve us, and the responsibility that comes with it.

You will be based in Amsterdam and work from the office most of the week. Early-stage decisions are made faster in the same room.

About you

• Senior engineering profile with strong product judgment, able to decide what not to build as easily as what to build.
• Strong backend and platform experience, comfortable with cloud infrastructure, APIs, data pipelines and third-party integrations.
• Experience building in a high-growth VC-backed startup, ideally between Seed and Series B.
• A track record of staying somewhere long enough to truly build and own something, rather than a series of short stints.
• Able to build fast without creating the kind of technical debt that becomes fatal a year later.
• Eager, a team player, and a fast learner. You want to build something meaningful from the ground up.
• Strong communication skills, including with merchants, payment partners and non-technical colleagues.

Nice to have

• Fintech, payments, disputes, chargebacks, or e-commerce experience.
• Hands-on experience with GCP, Airflow, BigQuery and Postgres in production.
• Experience integrating with payment providers, marketplaces, carriers or ERP and WMS systems.
• Experience hiring, onboarding and leading engineers.
• Familiarity with security and compliance frameworks such as SOC 2 or ISO 27001.

If you are excited about what we are building but do not tick every box, we would still like to hear from you. The bar is high, but it is a bar on judgment and ownership, not on a checklist.

Why Guzco

We are a small team solving a problem that is unglamorous, expensive and genuinely hard. Here is what we value:

• Ownership : You set your own goals, make the calls in your domain, and see the direct financial impact of your work on our customers.
• Craft : Pragmatic over perfect, but never careless. We are handling other people's money and other people's data.
• Ambition : You will be surrounded by people who set high standards for themselves and each other, and who treat obstacles as the work rather than as bad luck.

In addition, we offer:

• A market-rate salary and meaningful equity
• Direct impact on product, company and culture at a stage where all three are still being decided.
• An office in the centre of Amsterdam, and a team that actually likes being there.
• Yearly offsite with the team.
• 25 vacation days per year.
• Learning and development budget.

Our interview process

Our process is designed to assess mutual fit across skills, judgment and values. It typically includes the following steps:

• Intro call: A short conversation to align on your motivation, what you have built, and initial fit for the role.
• Technical deep dive: A close look at your problem-solving approach through a technical challenge, case study, or role-specific scenario.
• Onsite meeting: You will meet team members across functions to explore collaboration dynamics, team fit, and day-to-day context.
• Final conversation: A discussion about scope, equity, expectations and long-term alignment.