Senior Software Engineer KOERS, Arnhem

Overview

Join to apply for the Senior Software Engineer KOERS, Arnhem role at OverheidZZP . You will develop and maintain Kotlin/Java backend services for the Basisregistratie Kadaster (BRK) within an Agile scrum team, designing, testing and documenting software.

Responsibilities

• Develop and maintain Kotlin/Java microservices for the KOERS application.
• Design, implement and test new features and fix bugs, ensuring high code quality.
• Collaborate with other scrum teams and stakeholders.
• Participate in continuous integration and delivery pipelines (Tekton/Docker/Kubernetes).
• Automate deployments and monitor production systems.
• Engage in Agile ceremonies: planning, stand‑ups, retrospectives, sprint reviews.
• Contribute to architecture and design decisions.

Qualifications • Competencies

• Strong communication skills and team spirit.
• Proactive, quality‑driven and initiative‑seeking.
• Fluent in Dutch (spoken and written).
• Experience working in Agile/Scrum environments.

Technical skills & experience

• Java 21+, Kotlin, Bash, Kubernetes.
• Spring Boot, Spring MVC, Spring Cloud Gateway, Javalin.
• Event sourcing, CQRS with Axon Framework.
• SQL/PostgreSQL, Hibernate, JDBC.
• REST, SOAP, XML, JSON.
• Docker, Kubernetes, Azure/OpenShift, Helm, Tekton, ArgoCD.
• SonarQube, Git, GitLab CI, Tekton, GitHub Actions.
• Testing with JUnit, Mockito, Wiremock, Kluent, AssertJ.
• Grafana, Prometheus, Loki for monitoring.
• Experience with GitHub Copilot (optional).

Minimum experience

• At least 5 years in modern Java / Spring Boot environments.
• At least 3 years with Kotlin.
• At least 5 years writing unit and integration tests.
• At least 5 years with relational databases and SQL.
• At least 3 years with container workloads and CI/CD pipelines (Tekton/GitLab CI/GitHub Actions).
• At least 3 years with Kubernetes or OpenShift.
• At least 2 years with PostgreSQL.
• At least 3 years in production operations including monitoring and incident response.

Contract & application requirements

• The applicant must enter a three‑party detachment agreement as specified.
• The CV must be in Dutch and not exceed 10 pages (A4).
• Full application includes a motivation letter covering each requirement and an approximate hourly/monthly rate.
• A confidentiality agreement with the Kadaster must be signed before duties start.
• A VOG (certificate of good conduct) may be required.

Seniority level

Mid‑Senior level.

Job type

Full‑time.

Industry

Industrial Machinery Manufacturing (public sector context).

Location

Arnhem, Gelderland, Netherlands.