IT-System Engineer / Systemtechniker Linux 80% - 100% (m/w/d)

  • KastGroup GmbH
  • 29/05/2026

Job Description

Company description


KastGroup GmbH , headquartered in Wallisellen with a branch office in Schaan (Principality of Liechtenstein), specializes in cybersecurity and secure network infrastructure . Since 2014, we have supported organizations of all sizes in identifying and achieving appropriate security goals and in expanding and optimizing existing network infrastructures.

Our expertise and specialist know-how make us a competent partner , and our team philosophy makes us the ideal employer for our current team of 25 employees . We grow together through new challenges , bring passion to our work, and don't just do a job – we give it our all.


Job description


Are you looking for a place where you can showcase your talent and are you ready to contribute your skills to a dynamic company ? Do you use your free time for your own infrastructure projects and stay up-to-date on the latest technology trends? Would you like to independently design infrastructures and develop unconventional and creative solutions ? Do you hold a vocational qualification in computer science (EFZ), a bachelor's degree in computer science, or a similar qualification? Would you like to gain initial (or further) experience leading a small team and supporting our apprentices ?

If you can answer many of the above questions with "yes" and have already gained experience and knowledge in the following areas, or would like to, then you are exactly the person we are looking for to expand our existing team!

  • Linux Administration
  • Virtualization ( VM, Proxmox, VMware )
  • Network ( OPNsense, Unifi, Mikrotik, Sophos, Fortigate FW )
  • Container (Docker, Kubernetes / K8s)
  • Monitoring (PRTG)
  • Self-Hosting & On-Premises Hosting

Your tasks

  • Complete construction and design of new infrastructures
  • Management and security of networks and systems
  • Management and expansion of our own data center
  • Planning and maintenance of client/server systems
  • 2nd und 3rd Level-Support
  • Experience in the field of cybersecurity can also be gained upon request.
  • Experience can also be gained in team leadership and apprentice supervision upon request.


Additional Information

  • Flexible work arrangements
  • Continuous professional development opportunities and paid certifications
  • Home office by arrangement
  • 25 days (5 weeks) of vacation per year
  • Unlimited shopping discounts of 4% - 35% (Microspot, Interdiscount, Coop, IKEA etc.)
  • Attractive social benefits and company pension scheme (BVG)
  • Free coffee and various free soft drinks
  • Regular brunches and after-work drinks during working hours
  • A pool table, table football and a games console are available.
  • Modern office within easy walking distance of Wallisellen train station
  • Ergonomic workstation with standing desk
  • Flat hierarchies and co-determination rights