Full job description

Become part of our team

Do you want to have an influence on code, architecture, and collaboration, and not just process tickets?

We are a team of around 30 people and develop customized software solutions for demanding client projects. Instead of corporate structures and lengthy approval processes, you can expect short communication channels, direct decisions, and genuine proximity to projects, clients, and technology.

We develop backend systems and APIs for a variety of client projects – from mobile apps and web applications to platforms that connect multiple systems. This often involves clean integrations, stable data flows, and architectures that are maintainable in the long term and can evolve over years.

We deliberately avoid using classic titles like "Senior" or "Junior". Responsibility with us doesn't arise from a label, but from your contribution:

• your technical understanding
• the quality of your solutions
• your collaboration within the team
• your impact on the project

Roles develop from responsibility and experience in day-to-day project work – not from hierarchies.

Our projects are diverse and rarely trivial:

• different customers and industries
• Systems that grow and are further developed over years
• Technical decisions in the tension between quality, time and pragmatism

Many things are already working very well. At the same time, there are always areas we want to improve together – technically, organizationally, and in our interactions. If you enjoy contributing your ideas, taking on responsibility, and want to shape things sustainably, then you've come to the right place.

Your tasks

You're not just working on individual features, but on the further development of the systems themselves:

• Development and further development of backend systems and APIs
• Design and implementation of robust interfaces and data models
• Structuring and improving existing codebases
• active participation in code reviews as a form of technical exchange
• Making and classifying technical decisions in the project
• Contribution to the further development of quality, maintainability and teamwork
• Development of automated tests and sustainable development standards

‍

You don't have to rebuild everything – but you should be able to make things visibly better.

Your profile

For our projects, we are looking for team members who think beyond individual tasks, take on responsibility, and want to help shape sustainable software solutions.

• You have a completed degree in computer science or a comparable qualification.
• You make informed decisions – even when not all the information is available.
• You have a solid technical foundation and practical experience in backend development.
• You work in a structured, careful and pragmatic way.
• You question existing solutions and look for sustainable improvements.
• You value functional, type-safe, and maintainable solutions in software development.
• You have a good sense of how technical decisions affect long-term maintainability, scalability, and team productivity.
• You are interested in developing your professional skills and learning new things.

Last but not least: You enjoy software development – ​​understanding complex relationships, solving problems and developing good solutions together.

Your benefits

We have a clear commitment to quality – and we are constantly developing our working methods.

‍

Technically, we rely on technologies and standards including: PostgreSQL, modern API development with REST, GraphQL and OpenAPI, and automated testing as an integral part of the development process.

We develop backend systems and APIs that are used in various customer products and must remain viable in the long term – from classic REST and GraphQL interfaces to more complex data and integration systems.

Depending on the project, we work in a Scala environment with Play Framework, Apache Pekko, Slick and Cats, or in a .NET environment with .NET 4.8/Core, Entity Framework (Core), xUnit and Testcontainers.

Furthermore, we already have established engineering building blocks on which we consciously build, e.g.

‍

• GitLab CI with reusable pipeline components,
• Docker and Kubernetes for containerization & deployment,
• Logging & Monitoring with Prometheus and Grafana,
• Matomo for product-related analyses.

‍

Of course, we also offer classic benefits, including flexible working hours, modern workplaces, JobRad, Hansefit, and joint events and activities as a team.

Interested?

Please note that we do not offer remote jobs and aim for the daily presence of the entire team in our office. Do you prefer working on-site rather than remotely? Then you've come to the right place!

Interested? Then we look forward to receiving your application via our contact form or by email to bewerbung@cap3.de , including a brief CV, salary expectations, a list of your skills and, if applicable, the projects you have worked on – GitHub repositories are also welcome. Your contact person is Sören Fenner.

If your application impresses us, we look forward to meeting you in person at our office in Kiel and answering your questions. It's particularly important to us that we not only discuss formal aspects of your career, but also the technical topics that truly interest you.