Backend Developer | Backend Developer

activjob GmbH

Frankfurt am Main, Hessen, Deutschland
Published Mar 20, 2026
Full-time
Permanent

Job Summary

This full-time, permanent position involves developing and evolving 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, performance, and scalability. Your daily tasks will include developing rule-based modules, designing technical components, and implementing quality assurance through test-driven development. A significant focus of the role is the transition to cloud-based architectures using CI/CD and test automation. This position is particularly attractive as it offers a permanent contract with a regulated 39-hour work week, flexible time management through a working time account, and the opportunity to work on large-scale infrastructure projects within the logistics and transportation sector.

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, preferably in the logistics industry
  • 3 years of experience with Java EE, GitLab, Docker, Jenkins, and Maven/Gradle
  • 3 years of experience in Test Automation and Continuous Integration/Deployment
  • 3 years of experience with Cloud environments (e.g., AWS) and Cloud architecture
  • Professional experience with modern databases (PostgreSQL) and queuing mechanisms (ActiveMQ)

Languages

German (Fluent)

Additional

  • The role is based in Frankfurt am Main. Candidates must be able to work under the BAP collective agreement. Strong analytical thinking and proactive working methods are required.