Backend Developer | Backend Developer

activjob GmbH

Frankfurt am Main, Hessen, Deutschland
Published Nov 20, 2025
Full-time
Permanent

Job Summary

This role involves working as a Backend Developer, supporting projects for Deutsche Bahn, focusing on building and enhancing a high-performance booking and ticketing platform. The core responsibilities include developing Microservices backends within a Cloud environment, integrating complex booking and payment processes, and ensuring high standards for security, performance, and scalability. A key focus is the transition to a modern Cloud architecture utilizing CI/CD and comprehensive test automation. The ideal candidate will have a Master's degree in Computer Science or a related field, at least three years of experience as a Lead Developer in complex IT projects, and strong expertise in Java EE, DevOps, and various modern database technologies. This position offers an unlimited contract and the opportunity to work on mission-critical systems in a technically demanding environment, while also providing coaching and guidance to technical teams.

Required Skills

Education

Completed Diploma or Master's degree in Computer Science, Business Informatics, or comparable field

Experience

  • Minimum 3 years as a Lead Developer in complex IT projects
  • Minimum 3 years with Java EE, GitLab, Eclipse, Docker, Jenkins, Maven, Gradle, JSON
  • Minimum 3 years in Test Automation, Continuous Integration / Continuous Deployment
  • Minimum 3 years in Cloud Environments (e.g., AWS) and Cloud Architecture
  • Professional experience in the logistics industry (preferred)
  • Professional experience with asynchronous processing and queueing mechanisms (e.g., ActiveMQ)

Languages

German (Fluent)

Additional

  • Unrestricted employment contract; Willingness to work in Frankfurt am Main; Strong rhetorical skills in German (written and spoken)