Senior Software Engineer

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Senior Software Engineer

Mollie is one of Europe's fastest-growing fintech companies. We are looking for Senior software engineers who want to make an impact by working on next-generation financial APIs.

Full-time · Lisbon

Hi, we are Mollie! 👋🏼

Our mission is creating a greater playing field for everyone. By offering convenient, safe and worldwide payment solutions we remove barriers for companies of all sizes to compete on equal terms.

Your opportunity: 

As a senior software engineer you will be working with us on creating cutting-edge, user-friendly financial products and APIs which are used by tens of thousands of merchants on a daily basis. You will be working on highly scalable solutions that have many payments per second at any point of the day. Code quality and system scalability are becoming increasingly important. Helping us build scalable systems by thinking ahead will be an important part of your work.

What you'll be doing:

  • Helping us to build large scale systems.
  • Work closely with engineers and product in order to build features at a large scale.
  • Design, build and maintain APIs, services and systems across Mollie’s engineering teams.
  • Analyse & solve complex problems across the stack.
  • You will put your skills to the test, allow yourself to grow and learn rapidly.

Check out our full tech stack at StackShare.

Meet the team!


Senior Engineering Manager


Software Engineer


Software Engineer


Engineering Manager

What you have:

  • A minimum of 6 years experience in developing large scale web applications.

  • Experience with PHP is preferable, other languages (like Go, Java, Python) are a plus.
  • Knowledge of modern queuing and caching systems like RabbitMQ, Redis.
  • Experience in Service Oriented Architecture patterns.
  • Creative problem solving skills.
  • Excellent communication skills and experience working effectively with different stakeholders.

Nice to haves:

  • Experience in working in a fast paced environment
  • Experience working with Google Cloud Platform
  • Solid computer science background
  • Experience with event streaming (such as Kafka)

Our selection procedure in a nutshell:

  • Apply by clicking the button below. The more you share about yourself and the reason you apply at Mollie, the better!
  • Let's first have a 'coffee chat' to introduce Mollie, the role and get to know you. This can be at our office, but this could also be via phone, Hangouts or Skype.
  • During the interview phase, we'll inform you as soon as we've decided whether we'd like to proceed with you.
  • The interview phase may include a technical assignment to test your technical merits.

Because of the current circumstances, we will interview you as well as hire you completely remotely. However, as soon as possible, you will join us at our office in the heart of Lisbon.

Being authentic is our baseline

Mollie is one of Europe’s fastest-growing fintech companies. We provide a simple and clear payment API, which enables webshop and app builders to implement more than ten different payment methods in one go.

In the first few years of existence, Mollie was a developer-only adventure, and about 15 years later devs and techs still comprise roughly 45% of all staff. As a natural consequence, Mollie still is—and aims to be—highly tech-minded.

This focus on the technical side can be found in various things. Like, you pick whatever tools you want to use to get the job done. MacBooks, absurdly large or many screens, top-notch noise-cancelling headphones and whatever other equipment makes your nerd-boat float. We go to great lengths to create a space that allows you to focus on the things that will make you happy: shipping great features you helped dream up and build.

We don’t have code monkeys, but we do give you a problem and trust that you will create an outstanding solution. We believe in sane working hours and long-term solutions, instead of 70-hour work weeks with temporary workarounds.

What you get