Our engineering team sits at the heart of the company. We have a well-rounded team that cares about building great products that matter. You’ll be part of a modern fintech company where you can try things, break things, fix them, and learn fast. Your work is visible, your input matters, and you help shape both the product and how we build it. We stay close to what’s happening in the world of investing and fintech, and we share what we learn. It’s a place where you can stretch your skills, contribute to something real, and grow alongside people who take their craft seriously and enjoy building things together.

What you will do

You will have the opportunity to build exciting new features, ranging from core trading functionalities to user experience and engagement enhancements. We value your ideas and encourage everyone in the company to make investing accessible to all. Many of the features in our app originate from ideas generated by our team members. Your contributions will play a pivotal role in our journey towards continuous deployment and zero downtime.

As a Senior Software Engineer, here is an overview of what you’ll do:

Write clean, maintainable code with extensive test coverage.
Participate in code reviews and engage in technical discussions.
Collaborate with team members (or other teams) to define, design, and deploy new features.

Our tech stack

Java, Kotlin, Spring, Spring Boot, GCP, Kubernetes, CQRS and Event Sourcing with Kafka, Elasticsearch, Cassandra, Terraform, GitHub and GitHub Actions.

What you need to succeed

We are looking for you if you are passionate about what you do, you always leave the codebase better than you found it, you are eager to learn, and you enjoy trying out different things in collaboration with your peers. Furthermore, we require:

Excellent proficiency in Java 11+
Proficiency in object-oriented design skills
Experience designing systems for performance and scalability, while prioritising security
Proficiency in writing unit and integration tests
Strong understanding and experience with the Spring framework
Experience implementing REST services supporting client-facing applications
Experience with cloud native microservices
Experience with CQRS architecture pattern and Event sourcing
Familiarity with Agile Scrum development methodology

Nice-to-have

Experience with Kotlin (we increasingly use Kotlin for our backend services)
Experience with GCP (we manage our services throughout their lifecycle)
A DevOps mindset (we encourage our engineers to be involved in every stage of the systems development life cycle, from writing code to maintaining cloud infrastructure)
Experience with (and willingness to) use Gen AI tools to assist with coding

Why join BUX as a Senior Software Engineer?

Our code is modern (Java 11+ / Kotlin) and built with a quality mindset, minimising firefighting and legacy struggles
You will collaborate with a team of intelligent peers to build exciting new features
You'll find a learning, execution-oriented, and productive work environment
You will be part of a company that values your ideas and promotes continuous learning

How we hire

To learn more about our approach to hiring and how to prepare for your interviews, check out our How we hire section.

Adjustments for the hiring process

We want you to feel empowered to show your best self during the application process. If there's anything we can do to accommodate you better (interview timing, place, etc), please let us know in your application form.

Our benefits

International work environment
Company pension plan
Flexibility is at our core; we offer a hybrid work environment (1-2 days at the office)
Working from home allowance
Mobility benefit
Gym membership contribution via Urban Sports
Learning budget and full access to our learning and development platform
A1 Dutch language course for you (and your partner)
Delicious lunches at the office
The possibility to work from abroad for 1 month every 12 months
Take care of your mental and emotional well-being with unlimited appointments with psychologists or coaches through OpenUp
Regular team gatherings and fun company events

BUX for everyone

At BUX, we’re committed to making investing accessible and affordable for everyone through our intuitive app. We believe that a diverse team with a range of backgrounds, skills, and perspectives is key to achieving this mission. By embracing diversity, we strengthen our ability to innovate and serve our customers better.

To fully benefit from our diversity, it’s essential that everyone feels safe, included, and valued. We are dedicated to creating a workplace where each of us can bring our full selves to work and contribute to our shared goals.

Department: Engineering
Role: Java Software Engineer
Locations: Amsterdam
Remote status: Hybrid
Employment type: Full-time