Administrator IT-Security (m/f/d)

  • Frankfurt am Main
  • ASAP

Job Details

  • Linux Administrator IT-Security (m/f/d)
  • Frankfurt am Main
  • ASAP

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BE ONE STEP AHEAD: Help us make the internet a safer place!

A multi billion IT security market and Link11 is right in the middle of it! Worldwide, there could be more than 10 million DDoS attacks this year. Trend and tension are rising. We protect numerous customers around the globe such as Beiersdorf, RTL, Pokémon, Hornbach and Fraport with our cloud-based, automated and patented DDoS protection solution. With it, we secure IT networks and critical applications so that companies can continue to pursue their digital strategy without suffering from outages. Here we are ahead of the game. No one is faster and more precise than we are, as we are the leading European IT security provider in the field of cyber resilience. We have close to 100 employees working at our international locations –Frankfurt, Hamburg and Vancouver – some of them are 100% remote.Shape our digital future with Link11 in Frankfurt am Main.

We love what we do and live our mission. And that is exactly what we want to inspire you to do. Get on board and become part of the Link11 team: with you, we want to make the digital world of the future safer!

Your future challenges:

  • Proactively monitor, maintain and develop Linux infrastructure
  • Capacity planning for the Linux infrastructure
  • Maintain best practices on managing systems and services
  • Automation of standard tasks
  • Analyzes and resolves issues associated with the OS, hardware and software
  • Manage, coordinate, and implement software upgrades, patches
  • Provide input on ways to improve the security, stability, efficiency, resilience and scalability
  • Troubleshooting, 2nd and 3rd level support

Your Skills:

  • Solid experience with debian, apache, nginx, postgresql, kvm/qemu
  • Good knowledge of network protocols (TCP/IP, DNS, HTTP, SMTP, SNMP)
  • Good knowledge and experience with shell/perl/python
  • A team player in love with linux and IT-security

We are Link11!

  • We are living our startup mentality at heart. The stability of Link11 provides us with the framework for this – after all, we are no newcomers, but the founding team has been pulling the strings since 2005.
  • We have a lot of energy, short decision-making processes, and we implement changes directly.
  • We live a positive, interactive and appreciative working atmosphere in which all employees are able to contribute and develop.
  • We are growing fast and constantly
  • We are willing to leave our comfort zone for innovation and improvement because we want to be outstanding.
  • We have received several awards for forward-looking solutions.
  • We are cooperation partners of national and international associations and authorities.

You are right at Link11!

  • With us you will encounter your colleagues at eye level. We are all equal and without barriers!
  • With us, you are able to express and develop your strengths in a welcoming atmosphere.
  • With us you are not a number, but part of a highly motivated team.
  • With us, flexible working is possible, because you are more than just your job.
  • With us, your skills are part of our success.
  • With us, community is lived: team events, sundowners, after work parties bring us together (also internationally).
  • With us, taking care of our team will not end at the coffee machine or a filled fruit basket!
  • With us, you can expect interesting benefits such as fitness, JobRad, support for childcare fees and much more.

Contact us

You still have questions about this position? Contact us directly: Nadine Saewert from the Talent Acquisition department is your contact person. We look forward to getting to know you and learning more about you as a person and your professional career.

Got it? Then simply apply via our careers page at, including your salary expectations and the next possible start date.
We promise! We will get back to you within 48 hours of receiving your application with feedback whether we can get together for a first telephone interview!

Link11 GmbH
D-60314 Frankfurt am Main