1&1 Mail & Media Applications SE

System Engineer - Application Networking (f/m/d)

at subsidary 1&1 Mail & Media Applications SE in Karlsruhe or Munich
Reference ID: 1478


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 have a passion for Network Engineering and Linux? Do you like to work with modern networking concepts at the application layer 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 infrastructure platform in the area of L3-L7 networks we are looking for an experienced NetOps engineer. Be a part of a successful system engineering team and ensure the reliable operation of a future-proof infrastructure in the classical as well as in the Kubernetes world for more than 42 million customers.

  • Design and be a subject matter expert in the team for the planning and realization of our application networking.
  • Evaluate and assess new technologies and products in the areas of loadbalancers, firewalls, DDoS protection, CDNs, and SDNs.
  • Create concepts and internal best practices, participate in architecture decisions, and drive projects from conception to go-live.
  • 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? 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 L7 load balancing and Content Delivery Networks and the relevant protocols like HTTP, TLS and BGP.
  • Sound experience with L3-Routing and VxLAN, and familiarity with systems for attack detection and defense on application (WAF) and network layer (DDoS).
  • Expertise with containers and Kubernetes, the corresponding SDN topic and Service Meshes.
  • 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