Senior Quality Assurance Engineer (Event Streaming)

We are looking for a Senior Quality Assurance Engineer (Event Streaming) to join our BUX team based in Amsterdam . 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.

In a fintech environment, reliable event streaming is critical; a missed or duplicated message can affect ledger balances, payment workflows, and compliance. You'll play a hands-on role in validating the correctness, reliability, and resilience of our Kafka-based event-driven systems. As a Senior Quality Assurance Engineer for our Backend Broker team, your job is to get things done.

This could mean: Design, develop, and maintain automated and manual tests for Kafka-based producers, consumers, and event flows Execute manual and exploratory testing where automation is not feasible Integrate automated regression, smoke, and integration test suites into CI/CD pipelines (GitHub Actions) Help build and mature QA processes and standards for event-d