1&1 Mail & Media GmbH

Backend Software Developer Kubernetes, Java, Spring Boot (f/m/d)

at subsidary 1&1 Mail & Media GmbH in München
Reference Id: MU-EMue-2010050


We are a successful agile team of software developers, operations engineers and QA engineers. We plan, implement and integrate the central login infrastructure including its databases for our mail and cloud services at WEB.de, GMX and Mail.com. Work with us to provide critical software components for over 35 million customers with billions of requests daily.

  • You will design and develop highly scalable, heavy-load and fail-safe software that is operated in our own high-performance data centers on several continents.
  • You will develop Java services for our Single Sign-On infrastructure (login / authentication) and use Spring Boot, Docker, Kubernetes, Kafka and Cassandra for this purpose.
  • You will conduct extensive integration and load tests to ensure the availability of our systems and services.
  • You will develop new features and guide fellow developers from other teams regarding the integration of our single sign-on systems and our OAuth infrastructure.
  • You will work on your own projects or try out new technologies on prototypes during "Slack Days".

Your profile

Did you complete a technical degree or a comparable education? Are you interested in becoming part of an agile team and are you interested in developing highly critical single sign-on services for over 35 million customers? Your passion is professional and high quality software development and your work attitude is "hands-on"? Then we are looking forward to your application!

  • You have very good, several years of experience in object-oriented as well as functional software development with Java 11 or higher and are familiar with "clean code" and the development of distributed systems.
  • You can develop secure and modern Web services using Spring Boot, good knowledge of Linux, relational databases and the NoSQL database Cassandra is an advantage.
  • You are familiar with modern principles like Cloud Native, you are constantly educating yourself regarding new trends & technologies and ideally have practical experience with Docker, Kubernetes and Kafka.
  • You are strong in communication, your working method is precise and you like to take responsibility.
  • You appreciate an agile team and enjoy learning new things.
apply online now

For reasons of better readability, we have used the male language form (when and wherever applicable) throughout the text. However, this does not imply any kind of discrimination against other sexes, but should be understood as gender-neutral in the sense of linguistic simplification.


United Internet AG
Zentrales Bewerbermanagement
Hinterm Hauptbahnhof 3
D-76137 Karlsruhe

Tel: +49 721 91374-6891