1&1 Mail & Media Applications SE

(Senior) Load Balancer Engineer (f/m/d)

at subsidary 1&1 Mail & Media Applications SE in Karlsruhe or Munich
Reference ID: 1607


About us

With our strong brands GMX, WEB.DE and mail.com and over 42 million active users, we are the leading email and communications platform in Germany, Austria and Switzerland. From this strong market position, services and apps are developed that simplify users' digital lives - from office tools and cloud solutions to personal ID management.

Your Tasks

Do you like to work with modern networking concepts in close collaboration with the application domain and want to make a real difference? Then we are looking for you! WEB.DE and GMX are the leading E-Mail and Cloud providers in Germany. For the future development of our network cloud platform we are looking for an experienced Load Balancer Engineer. Be a part of a successful engineering team and ensure the reliable operation of a future-proof infrastructure in the classical as well as in the cloud-native world for more than 42 million customers.

  • Design, configure and operate network services with focus on load balancing, e.g. F5 LTM/GTM, ASM, SSL Offloading, iRules, etc.
  • Configuring and troubleshooting network technologies like BGP, Routing Domains, VLANs, VxLAN, etc.
  • Design & implement network infrastructure automation using Ansible and Python.
  • Interface between data center and application operations, be the first contact for technical questions, and share your knowledge in internal trainings.
  • Detect anomalies and get to the bottom of them - also as a part of our 24/7 on call rotation.

We Appreciate

Have you completed a technical degree or are you an enthusiastic Linux pro? Do you have several years of professional experience as a system engineer with a focus on networking / load balancing? Are you eager to learn new technologies and love to continuously develop your professional expertise further? Are you a team player at heart and you like to be hands-on? Then we're looking forward to your application!

  • Excellent knowledge in the areas of cloud platform network infrastructure (e.g., Kubernetes networking) and load balancer operations, e.g., appliances such as F5 LTM/GTM.
  • Sound experience with L3-Routing, BGP, VxLAN, and familiarity with systems for attack detection and defense on application (WAF) and network layer (DDoS).
  • Track record of running and delivering business-critical services out of different data center.
  • Structured thinking and able to understand complex environments consisting of local firewalls, network firewalls and network policies.
  • Strong communicator in English, actively sharing know–how and enjoy taking on responsibility.

apply online now

We value diversity and welcome all applications - regardless of, for example, gender, nationality, ethnic or social origin, religion, disability, age as well as sexual orientation and identity, physical characteristics, marital status or any other irrelevant factor subject to applicable law.


1&1 Mail & Media Applications SE
Recruiting & Candidate Management

Brauerstraße 48
D-76135 Karlsruhe