Application 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

At Mollie, data and money movement are at the heart of everything we do — and the engineers who build and maintain these systems are central to our mission.

As an Application Engineer II, you will work on systems that operate at the core of Mollie's platform — from the financial infrastructure that underpins every payment we process, to the data products that help our merchants grow, protect their revenue, and optimise their performance.

The work is high-stakes, high-ownership, and highly visible.

You will be building systems where correctness, reliability, and scale are non-negotiable — and where the things you ship directly impact more than 250,000 businesses across Europe.

This is not a maintenance role.

You will be joining a small, fast-moving team with a clear and ambitious mandate, working in a delivery-first environment where you take ideas from concept to production.

You will have real end-to-end ownership, collaborate closely with engineers, product managers, and stakeholders across domains, and contribute to some of the most strategically important work happening at Mollie right now.

What you will be doing:

Design, build, and maintain backend systems and APIs that operate at high scale and high frequency — where performance, fault tolerance, and reliability are critical.

Take ownership of features end-to-end, from architecture and estimation through to delivery, production support, and continuous improvement.

Contribute to ambitious migration and modernisation initiatives, decoupling legacy dependencies and building cleaner, more scalable foundations for the future.