Backend Developer | Backend Developer

activjob GmbH

Frankfurt am Main, Hessen, Deutschland
Published Feb 18, 2026
Full-time
Permanent

Job Summary

This role involves the development and continuous improvement of a high-performance booking and ticketing platform for Deutsche Bahn. As a Backend Developer, you will be responsible for integrating complex booking and payment processes into a modern microservice architecture while ensuring the highest standards of security, scalability, and performance. Your day-to-day work will focus on developing microservices in cloud environments, designing technical components, and implementing rule-based booking modules. A significant portion of the role involves quality assurance through test-driven development and coaching technical teams to enhance development quality. This position is particularly attractive due to the permanent employment contract, a regulated 39-hour work week under the BAP collective agreement, and the opportunity to work on large-scale infrastructure projects for a major national transport provider. The role offers a flexible working time account and the stability of a long-term partnership with a prestigious client.

Required Skills

Education

Completed Diploma or Master's degree in Computer Science, Business Informatics, or a comparable field of study.

Experience

  • At least 3 years of experience as a Lead Developer in complex IT projects
  • 3 years of experience with Java EE, GitLab, Docker, Jenkins, and Maven/Gradle
  • 3 years of experience in Test Automation and CI/CD pipelines
  • 3 years of experience with Cloud environments and Cloud architecture
  • Professional experience in the logistics industry is preferred
  • Proven experience with asynchronous processing and queuing mechanisms

Languages

German (Fluent)

Additional

  • The position is based in Frankfurt am Main. Candidates must be able to work under a BAP collective agreement (Tarifvertrag). Proactive and structured working style with high resilience is required.