Software Engineer in Test - Data Solutions Team - Kotlin & Python(d/f/m)

What is working at Bettermile like?

• We mean it when we say “cutting edge” and have a high level of creative freedom in our everyday work.

• You will be surrounded by like-minded, driven, skilled, and highly motivated people who are keen to contribute to successful solutions.

• We mean diversity, and we put it in numbers: 100+ people, 33 languages, 41% female (vs. ø26% in the tech industry), ø33 years of age, and yes, we do have Schlager-Fans among us.

• We have a very supportive and appreciative working environment with a lot of autonomy, a flat hierarchy, and professional growth possibilities.

• We work in a hybrid mode, with weekly team days for better collaboration and nurturing interpersonal connections. When onsite, we work in a modern, kid- and pet-friendly Better Space in the heart of Berlin-Kreuzberg.

• Remote work from anywhere for up to 12 weeks in total per year.

• 30 vacation days in a 5-day/week working model.

• Part-time for 32 hours is possible.

• Kindergarten grant and a Company Pension scheme.

• Regular team breakfasts, fitness & wellness classes, company runs, and other events. Fruits, snacks, drinks, and coffee with a variety of milk are a given - but yes, we have them.

• Outstanding flexibility we are proud of – and, of course, the best colleagues in the world!

The Data Solutions Team is part of the Better Tracking Tribe at Bettermile. As a Software Engineer in Test, you are going to help us elevate our test strategy and CI/CD culture across teams.

You’ll join the Data Solutions teams, working on microservices written in Kotlin with Spring Boot and various data processing pipelines in Python. Your mission will be to define and implement a robust automated testing strategy that covers everything from backend APIs to data quality in our lakehouse environment, all integrated into our CI/CD pipeline.

You will be taking care of

• Designing and implementing automated test suites for Kotlin-based microservices and Python-based data systems.

• Contributing to developing and integrating testing in our CI/CD processes.

• Driving test coverage, performance testing, regression testing, and data validation strategies.

• Collaborating with backend engineers, data engineers, and DevOps to improve overall quality and resilience.

• Exploring the use of AI tools for test generation and more innovative failure detection.

• Supporting architectural and strategic QA decisions within the team.

You check these boxes

• At least 3 years of experience in QA Automation, Software Engineer in Test, or Backend Engineering roles.

• Hands-on experience writing tests for microservices inKotlin/Java, usingJUnit,RestAssured, or similar frameworks.

• Familiarity with automated testing of data quality, metrics validation, or schema evolution (e.g., Great Expectations).

• Comfortable with CI/CD workflows and integrating tests into pipelines (GitHub Actions, GitLab CI, etc.).

• Proficiency in Business English.

It is awesome if you also have

• Experience with AWS services like S3, ECS, Lambda, EventBridge, Athena, Glue, etc.

• Experience with containerized testing environments using DockerorKubernetes.

• Familiarity with contract testing (e.g. Pact), Cucumber, or AI-based test generation tools.

• Proficiency in Python for scripting or testing data pipelines.

• An interest in continuously improving testing culture across engineering teams.

Take your chance

Take your chance and step to the forefront of changing a rapidly growing industry with your contribution. You will take responsibility quickly, however, supported by mentors at all times. We provide an open corporate culture based on sharing and learning, equal footing collaboration, and short decision-making.