Senior Kubernetes Engineer (m/f/d)

STACKIT; Bad Friedrichshall; On-site; EUR 80,000 - 120,000; Full time

Job summary

STACKIT is seeking an experienced Go developer with deep Kubernetes expertise to design and implement scalable infrastructure and services. You will own end-to-end responsibilities from architecture to operation, including security, policy enforcement, and GitOps delivery.

You will work with Gardener or ClusterAPI to manage multi-cluster environments, contribute to open source, and communicate with international, agile teams in English. German skills are a plus.

Qualifications

• Proficient in Go with a track record of building scalable software.
• Strong Kubernetes expertise, including operator development and cluster design.
• Hands-on experience managing Linux servers and Kubernetes clusters from scratch.
• Experience with open source collaboration and contributing to communities.
• Excellent written and spoken English; German a plus.

Responsibilities

• Design and implement scalable Kubernetes services and the surrounding infra landscape.
• Analyze complex issues, perform root-cause analysis, and implement lasting solutions.
• Drive cluster security with policies (RBAC, network policies, Kyverno) and auditing.
• Develop operators, controllers, and CRDs in Go; enable GitOps workflows.
• Collaborate with cross-functional teams and maintain thorough documentation.

Skills

Go

Kubernetes

Kubernetes Operators

Linux

Networking

Open Source

English

Tools

Gardener

ClusterAPI

Kyverno

Job description

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

• Design and Infrastructure: Architect and implement scalable solutions that bring Kubernetes services to our customers, taking ownership of the surrounding infrastructure landscape (compute, networking, storage, and APIs)
• Operations & Problem Solving: Ensure the smooth operation of the service by analyzing complex technical issues, performing thorough root-cause analysis, and implementing lasting solutions
• Security & Compliance: Drive cluster security and compliance, developing robust policies (such as RBAC, Network Policies, and Kyverno) and implementing advanced measures (including Falco, image scanning, and audit logging)
• Operator Development & Automation: Extend and automate the Kubernetes platform by designing and developing custom operators, controllers, and Custom Resource Definitions (CRDs) in Go, while streamlining platform delivery via GitOps workflows
• Teamwork & Documentation: Partner closely with cross-functional experts and maintain clear, thorough documentation to ensure team alignment and seamless knowledge sharing

Your Profile

• Software Development & Go: Several years of experience in software engineering, with a strong proficiency in Go (Golang) and a proven track record of developing custom Kubernetes operators, controllers, and CRDs
• Platform Architecture & Operations: A "You Build It - You Run It!" mindset backed by hands-on experience operating Linux servers and administering Kubernetes clusters from scratch. You possess a deep understanding of K8s internals, cloud networking, storage, and API design
• Kubernetes Orchestration: Familiarity with ecosystem orchestrators - preferably Gardener or ClusterAPI - to effectively manage and scale multi-cluster environments
• Open Source Collaboration: Experience with or a strong interest in actively contributing to the open-source community, taking ownership of features, and coordinating developments with other community members
• Communication & Languages: Excellent English skills to ensure successful collaboration within our international, agile teams; working knowledge of German is a valuable plus