1&1 Mail & Media Applications SE

Network Engineer (f/m/d)

at subsidary 1&1 Mail & Media Applications SE in Karlsruhe
Reference ID: 841


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

You have a passion for Network Engineering and Linux? 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 we are looking for an experienced network engineer with focus on L3-L7 protocol levels, who is feeling at home both in the networking domain as well as in the Linux world. Become 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 container world for more than 40 million customers.

  • You're evaluating and assessing new technologies and products in the areas loadbalancer, firewalls, DDoS protection and SDN.
  • You're creating concepts and internal best practices, and you're part of the projects from conception until go-live with a strong involvement into architectural decisions.
  • You're the first contact for technical questions regarding network topics.
  • You're operating and monitoring platform services and are resolving incidents.
  • You're supporting automation of the network and system landscape.

We Appreciate

Have you completed a technical degree or you are just an enthusiastic Linux pro? You have several years of professional experience as network or system administrator and are interested in network technologies on application layer? You're a team player at heart and your working attitude is hands-on? Then we're looking forward to your application!

  • You're having sound knowledge in the areas network topology and L3 routing, and especially with transport, session and application protocols like TCP, HTTP, TLS. Ideally you're also familiar with dynamic routing protocols like OSPF, ISIS and BGP.
  • You're experienced in the configuration and operation of loadbalancers, are versed in systems for attack detection on application layer (e.g. Web Application Firewalls) and are proficient in scripting with e.g. Python, Bash or Perl.
  • Ideally you've already made experiences with container technologies (e.g. Kubernetes), the respective SDN products and Service Meshes.
  • You're structured and stay on top of even complex environments consisting of local firewalls, network firewalls and network policies.
  • You're enjoying to create concepts, you're a strong communicator, also in English and like to take 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