Full Stack Engineer

Your opportunity

At Mollie, we have the goal of delivering effortless payments and money management for every business, and our Security and User Management team plays a crucial role in enabling this vision. We're looking for a talented Full Stack Engineer to join our team and help us create a frictionless and intuitive Identity and Access Management (IAM) system that empowers our customers. Imagine crafting a user experience that makes authentication and authorization feel like a natural extension of our product, a seamless flow that doesn't hinder but rather enhances the journey.

You'll be at the forefront of this evolution, designing and implementing elegant solutions that prioritise user experience and security, ensuring our customers can navigate the complexities of financial services with ease. This isn't just about building systems; it's about building trust and confidence in Mollie, a foundation upon which we can grow our product suite and expand into new financial services offerings.

Join us and be part of a team that's not only shaping the future of payments but also defining the standard for user-centric security in the financial sector.

What you'll be doing

You will be working with us on creating cutting-edge, user-friendly financial products which are used by hundreds of thousands of users on a monthly basis.

We care for quality and well-designed user experiences—for engineers and non-engineers alike. This translates to clean, well-documented REST APIs and equally smooth user interfaces for our customers.

As a Full Stack Engineer, you bridge the gap between those APIs and user interfaces, working across the spectrum to translate our APIs to intuitive products which our non-technical customers use to access our services.

With multiple payments being performed on our platform every second of the day, code quality and system scalability are becoming increasingly important. Helping us build scalable products by thinking ahead will be an important part of your work.

Next to our existing APIs and dashboard, we are working on innovative financial solutions for our customers. We are happy to share the details over a coffee, but it's safe to say we will put your skills to the test allowing you to grow and learn rapidly.

Our architecture

We come from a monolithic background, with our core systems being written mostly in PHP. As our company started to scale up rapidly, we have scaled our infrastructure along with it by employing services, as well as queueing systems.

Mollie’s frontend landscape consists of multiple apps, and each application has its own setup, which is optimised for the app’s purpose. Think of our dashboard, API documentation, mobile apps, etc.

In general, our apps are written using TypeScript, in React. Most of our backend systems are written using PHP and are hosted in the Google Cloud.

We work with flexible and reusable components, have an extensive UI library that we maintain internally, and are always looking for parts of the codebase that we can open-source and share with the community.

As a Full Stack Engineer, you will be building out new features using the UI library that’s maintained by our UI Engineers, and work closely together with them to further improve this library.

What you'll bring

Always Be Shipping Mindset : It’s about consistently delivering value to customers, where speed and quality go hand in hand.

Minimum of 4 years experience with developing mobile apps & web applications.

Experience with React & React Native .

Knowledge of language primitives. You should feel comfortable interacting with native APIs built into the browser.

While you don’t have to be an expert on CSS, you are comfortable implementing a user interface using components available in our design system.

Experience with test-driven development.

Experience with creating public or internal REST APIs.

A knack for creating intuitive and secure user experiences.

You enjoy being a generalist, working on frontend, backend, as needed to solve problems and delight our users.

Nice to have

You have experience mentoring other engineers, and like to help others grow in their careers.

If you have experience with design systems and / or internally developed component libraries, that is a big advantage

Why Mollie?

Join one of Europe’s fastest-growing fintechs and help redefine how businesses manage payments and identity.

Work from our Lisbon hub with a passionate team of 60+ engineers who love what they do.

Collaborate across teams and make a direct impact on the security and scalability of core infrastructure.

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