Backend Developer | Backend Developer

activjob GmbH

Frankfurt am Main, Hessen, Deutschland
Published Apr 19, 2026
Full-time
Permanent

Job Summary

As a Backend Developer, you will play a pivotal role in building and evolving a high-performance booking and ticketing platform for the Deutsche Bahn. Your day-to-day responsibilities include developing microservices, integrating complex booking and payment processes, and transitioning systems to a robust cloud architecture. You will focus on security, scalability, and performance while implementing CI/CD pipelines and test automation. Beyond coding, you will act as a technical coach, mentoring team members to ensure high-quality software standards. This position is ideal for an experienced professional looking to work on large-scale logistics projects within a stable, long-term employment framework. You will benefit from regulated working hours, a flexible time-tracking system, and the opportunity to shape critical infrastructure for a major national client.

Required Skills

Education

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

Experience

  • Minimum 3 years of experience as a Lead Developer in complex IT projects, preferably in the logistics industry.
  • Minimum 3 years of experience with Java EE, GitLab, Eclipse, Docker, Jenkins, Maven, Gradle, and JSON.
  • 3 years of experience in test automation, CI/CD, and cloud environments.
  • Professional experience in software architecture, system design, and database management in cloud environments.

Languages

German (Fluent)

Additional

  • Valid work permit for Germany is required. This is a permanent, full-time position under the BAP collective agreement.