Job description:
* * Framework parameters * *
* * * 01.05.2026 to 31.12.2026 (with option for extension, 3 years)
* * Full capacity 100%
* * Location: * * about 98% remote, possibly 5 days in Essen (NRW)
* * Budget: * * approx. 65,00 EUR
* * Tasks * *
1. Design and evaluation of software solutions in the enterprise crisis-Java environment (design, specification)
2. Further development and maintenance of existing applications including Error analysis, debugging and sustainable bug fixes
3. Implementation of user stories including Code reviews and further development of existing architectures
4. Implementation and extension of automated tests (unit / integration tests) and monitoring of downstream test levels
5. Performance optimization (e.g. SQL / Query tuning, Bottleneck analysis)
6. Coordination of technical decisions with adjacent teams / architecture in agile setup
7. Optional per sub-requirement: interface development (REST, if applicable SOAP) and security requirements in the development lifecycle
* * Must-has * *
1. Multi-year senior experience in Java (Enterprise) with clean design / OOD
2. Proof of architecture / concept in projects (no pure implementation)
3. Code review practice (active, regular)
4. Test automation (e.g. JUnit) and quality understanding
5. SQL very good (DB2 of advantage, but not mandatory)
6. German knowledge
* * Optional per component requirement * *
1. Spring boat or Java EE / JEE
2. REST APIs; SOAP as a plus
3. UML / Modelling Tools
4. Performance
- and Troubleshooting experience (logs, debugging)
5. Security: Secure coding / OWASP (certificates may be collected before start)
6. Container / Platform Basics (Docker, Kubernet or OpenShift)