Java Backend Developer – Spring Boot, Camunda
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Job Description
Java-Backend-Entwickler für Spring Boot, Camunda und Microservices bei Rockstardevelopers. Entwicklung, Betrieb und Automatisierung von Enterprise- und Behördenprojekten.
Responsibilities:
- Work on client projects for large companies and public-sector organizations, embedded within their teams
- Design, develop, and test Java-based microservices
- Develop synchronous and asynchronous REST and SOAP APIs using OpenAPI 3
- Automate processes with Camunda BPM
- Automate testing with JUnit 5 and Cucumber
- Operate your own services, including deployment, monitoring, and troubleshooting
- Help shape software architectures
- Generate, review, and refactor code using Claude Code, Copilot, or Cursor
- Coordinate with cross-functional stakeholders across team boundaries
- Participate in scheduled on-call rotations for developed services
- Attend occasional on-site client meetings every few weeks
Requirements:
- Senior-level experience; able to work independently and deliver from day one
- Java and Spring Boot, along with Spring Data and Hibernate/JPA
- Design, development, and testing of microservices
- REST and SOAP web services (JSON/XML over HTTP), OpenAPI 3
- PostgreSQL and Oracle
- JUnit 5 and Cucumber
- Docker and Kubernetes
- CI/CD with GitLab Pipelines; Maven for builds
- Git, Jira, Confluence, and agile methodologies
- Hands-on Camunda BPM experience from real-world projects
- OAuth 2.0 and Keycloak for authentication and authorization
- German at native level or C1/C2 proficiency
- Fluent English
- Productive use of Claude Code, Copilot, or Cursor (AI tools are required)
- Willingness to participate in scheduled on-call rotations
- Nice to have, but not required: Apache Kafka and asynchronous communication; XML, XSD, XSLT; experience working on complex projects involving multiple teams; legacy J2EE systems and migration to Spring Boot
Benefits:
- Work from home, from the office, or a combination—you decide
- MacBook (unless the client provides its own hardware)
- A variety of clients and projects
- The founders are your direct points of contact
- Internal upskilling in AI development
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