Senior JAVA Engineer at Metasite working on complex systems and reliable solutions. Involved in end - to - end execution technology for trading systems.
About the role
- Backend Developer enhancing core product for FLUX Systems, focusing on microservices with Spring Boot and Quarkus. Collaborating in small teams with a focus on quality and longevity.
Responsibilities
- Develop and enhance our microservice backend (Spring Boot & Quarkus)
- Design, implement and operate robust APIs and event-based integrations (Kafka)
- Implement and maintain database migrations (PostgreSQL / Flyway)
- Ensure code quality, stability and long-term maintainability
- Build and maintain unit and integration tests (e.g., Testcontainers)
- Co-responsible for the build & operation of services: CI/CD (Jenkins), containers/Kubernetes and deployments with Helm
- Work closely with frontend and product management to deliver a consistent, functional overall solution
- Evolve our technology stack (e.g., Java updates up to Java 25) and drive continuous engineering improvements
Requirements
- Several years of experience in backend development with Java
- Strong knowledge of Spring Boot and/or Quarkus (microservices)
- Solid understanding of PostgreSQL, data modeling and Flyway migrations
- Experience with Kafka or comparable messaging/eventing architectures
- Practical experience with CI/CD (e.g., Jenkins) and a basic understanding of Kubernetes/Helm
- Clean code practices, architectural understanding and a passion for long-lived systems
- Advantageous: integrations with ERP systems (D365/NAV/SAP) or OPC-UA
- German at near-native level
Benefits
- Work on a product used daily in industry — real impact, real processes
- Small teams, direct communication and significant scope to shape the product
- Hybrid working model: home office + office in Heilbronn/Bad Friedrichshall (or remote)
- Responsibility for own areas and active involvement in shaping architecture and processes
- Flat hierarchies, honest feedback and collaboration on equal footing
Job title
Job type
Experience level
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Not specified
Degree requirement
Tech skills
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