Senior JVM Software Engineer with Keycloak

We are looking for an experienced Java Developer with strong expertise in Keycloak, covering both back-end and front-end aspects.

You will be responsible for the technical implementation and continuous development of Keycloak-based solutions, including client integrations, security and authentication concepts, frontend customizations, and the delivery of business requirements in close cooperation with stakeholders.

On-call duty: 1 week per month.

Responsibilities:

• Design, implement, and maintain Keycloak solutions.
• Develop and customize authentication and authorization mechanisms.
• Implement security and identity concepts based on OpenID Connect.
• Integrate Keycloak with client applications.
• Develop and maintain backend services in Java.
• Customize Keycloak frontend (themes, UI).
• Support CI/CD pipelines and DevOps processes.
• Monitor and troubleshoot applications in production environments.

• Strong experience in Java (17+) and modern backend development
• Solid knowledge of Keycloak and identity & access management (OpenID Connect, REST)
• Experience with containerized and cloud-native environments (Docker, Kubernetes, Helm)
• Hands-on experience with CI/CD pipelines (Jenkins)
• Good understanding of SQL databases and HTTP-based architectures
• Familiarity with modern frontend technologies (HTML, CSS, JavaScript)

Nice to have:

• Experience with Spring Boot 3.x and infrastructure-as-code tools (e.g. Terraform).
• Knowledge of monitoring and quality tools such as Grafana, Prometheus, Sonar.
• Experience with PostgreSQL and dependency/security tracking tools.
• Familiarity with template engines such as Freemarker.