Full Stack Engineer II

Build with us Since 2004, we've had one clear goal: to make payments and money management effortless for every business in Europe.

Today, more than 250,000 companies use Mollie to get paid, manage money and grow – with products designed to be simple, scalable, and dependable.

With 950+ Mollies across 14+ locations, we care deeply about autonomy and craft.

So we work in small teams, with real ownership, and we trust you to make the right decisions.

We're building for the long term, so we provide the tools you need, processes you can rely on, and a balanced work environment to help you do work you're proud of.

Sound like your kind of place?

Let's build together.

Your impact

Partner Experience sits inside Connect, Mollie's set of tools and APIs that let platforms and marketplaces offer payments to their merchants without friction.

This team is focused on the self-serve track: helping partners find the right product, own the integration, and manage multiple sub-merchants with confidence.

It is a domain in active transformation, with a broad scope and real engineering influence over how partner interactions evolve.

As an Full-Stack Engineer II on this team, you will take genuine end-to-end ownership of a product alongside a small, dedicated group.

This is not a role where you implement a spec and move on.

You will work across frontend, backend and full-stack, reason about system design, weigh product trade-offs before writing a line of code, and bring your own ideas to the table.

The team actively encourages engineers to challenge thinking and expects the same in return.

If you thrive with broad scope, enjoy context-switching across complex systems, and want to shape a product from the ground up rather than maintain existing logic, this is the right place to do it.

What you'll ship

Take end-to-end ownership of product development, from shaping the idea through to building, testing and measuring performance in production.

Design, build and maintain APIs, services and embedded components across frontend, backend and full-stack, with a focus on the self-serve integration experience including Connect activation, regular payment API exposure and multi-sub-merchant support.

Build and contribute to large-scale systems capable of handling high volumes of transactions efficiently, thinking in system design terms rather than adjusting existing patterns.