Strong programming skills in Go (Golang) and Python Solid experience with OpenStack in a production environment Strong understanding of Linux virtualization — KVM, QEMU, and libvirt Hands-on experience operating infrastructure at scale, with a focus on reliability and automation Comfort working close to the metal: kernel behaviour, hypervisor internals, and low-level debugging don't intimidate you Introduction text Schwarz Digits creates the technological foundation for digital sovereignty in Europe. As the IT and digital division of the Schwarz Group, we develop and manage the IT infrastructures for the retail divisions Lidl and Kaufland, as well as Schwarz Production and PreZero. At the same time, we operate as an independent provider in the external market to support companies across Europe in their digital transformation. We bundle our core services in the areas of Cloud, Cyber Security, Data & AI, Communication, and Workspace. Join us and contribute to digital sovereignty in Europe. With us, you will work at the intersection of agility and security: You will benefit from fast decision-making processes, enjoy genuine creative freedom in your projects, and be able to build upon the stable foundation of the Schwarz Group. Your tasks Develop and maintain features for STACKIT's compute products, covering generic server capabilities, GPU servers, and confidential computing Contribute upstream to open source projects such as OpenStack and YAOOK, and modify virtualization technology where needed to enable product features Optimize virtual machine performance, including live migration Introduce new generations of machine types and extend the compute product portfolio Evaluate and integrate GPU and confidential computing technologies