System Engineer - Virtualization

• Are you passionate about virtualization, Linux systems, and automation? As a Systems Engineer, you'll help shape a highly available HCI platform that powers one of Europe's largest email services, serving over 42 million users across WEB.DE, GMX, and mail.com. This platform delivers cloud-like virtualization "on-prem" with GitOps-style management, elastic workloads, and transparent "VM to Kubernetes" interoperability through KubeVirt. Your work enables application teams to run workloads securely, efficiently, and with predictable performance across data centers, while laying the foundation for future Kubernetes-native platform services. Are you ready to take ownership of virtualization architecture for a platform serving millions? Do you thrive on performance challenges and building scalable clusters? You will:

• Design, implement, and operate a Harvester- and Kubernetes-based virtualization platform.

• Integrate distributed storage and manage compute resources across clusters.

• Automate provisioning, lifecycle, troubleshooting, and monitoring using Ansible, GitOps pipelines, and APIs.

• Conduct migrations, performance tuning, benchmarking, and incident response across virtualization estates.

• Collaborate with platform, networking, and storage teams to ensure robust end-to-end infrastructure services.

Do you have hands-on experience with virtualization and Kubernetes-based infrastructure? Are you skilled in Linux and automation tooling?, * Strong understanding of virtualization technologies (Harvester, KubeVirt, QEMU/KVM, Proxmox, VMware, or similar).

• Experience with Kubernetes ecosystems, ideally including Helm, CNI, CSI, CRDs, and GitOps workflows.
• Knowledge of distributed storage systems, especially Longhorn (or Ceph).
• Proficiency with Linux systems, debugging, monitoring, and performance tuning.
• Automation experience using Bash, Ansible, Python, Puppet, and infrastructure-as-code principles.

Our benefits in detail

Lived corporate culture: Flat hierarchies, a culture of respect and appreciation, signatories of the Diversity Charter, open communication, and no dress code.

Wide range of further training: Internal and external training opportunities, LinkedIn Learning, language courses, talent development programs, conferences, and mentoring.

TEC-Campus: Free choice between Linux, Mac, or Windows, slack days, conferences, lecture series, courses, open-source projects, community meetups, and user groups.

Flexible working models: Home office options, flexible working hours, and 30 days of vacation with the option for additional unpaid leave.

Financial benefits: Corporate benefits, company pension scheme, capital-forming benefits, occupational disability insurance, and various partner discounts.

Events: Summer and winter parties, sports tournaments, and team events.

We are brand. With GMX, WEB.DE and mail.com and over 42 million active users, we are the leading email and communication platform in Germany, Austria and Switzerland.

We are future. Our services and apps simplify digital life from cloud storage to news and ID management.

You are at home. Your digital passion finds a professional home with us. Your strength makes us stronger, your expertise complements our ideas, your success becomes visible. Together we shape the digital future.