Senior Site Reliability Engineer / SRE – Kubernetes & Hybrid Cloud (m/f/d)

At a glance 

• Location & work model : Berlin, hybrid
• Tech stack: Kubernetes on our own servers, Harvester ( KubeVirt ), Argo CD/Flux, Prometheus/Grafana, Longhorn/Ceph
• Team: A growing SRE team – you report to our CTPO for now and to the Team Lead SRE we're hiring next; two system administrators in Pforzheim run the physical hardware
• Process: Intro call · take-home task (~2h) · 90-min tech interview with our developers · leadership conversation · meet the team
• Languages: Fluent English required; German is a plus, not a must

Why this role is special 

Your first 90 days 

Define and own SLOs, SLIs and error budgets; drive data-informed reliability decisions Lead incident response end-to-end: fast detection, clear communication, blameless postmortems – and reduce whole classes of incidents structurally, not case by case Eliminate toil through automation and GitOps; evolve our observability (metrics, logs, traces, alerting, runbooks) across two different stacks Help build our custom Kubernetes operator (CRDs) that makes stateful search clusters declarative, self-healing and safely upgradable – and roll out the auto-scaling (HPA/VPA, KEDA, cluster auto scaler) today's architecture makes hard Plan capacity, performance and cost across on-premises and cloud – including the large-catalogue and peak-season loads our merchants care about – and use AI tools wherever they measurably speed up diagnosis and operations

Must-haves:

Kubernetes in production – built, not just used : you've set up and maintained clusters on your own servers (e.g. kubeadm , RKE2, k3s) and know cluster lifecycle and upgrades – managed-only experience isn't enough for this role Lived SRE practice : SLOs, error budgets, incident management, on-call Hands-on experience with GitOps or comparable infrastructure/deployment automation – experience with Argo CD or Flux is a strong plus Solid observability skills – metrics, logs, traces, alerting that people trust A strong automation instinct – you'd rather fix a problem's cause than repeat its workaround A collaborative, enabling mindset – you see SRE as a service to our developers: you ask what they need, discuss trade-offs openly, and don't fall in love with your own solution Nice-to-haves (genuinely optional – we'll teach you the rest):

Harvester, KubeVirt , vSphere/ ESXi , OpenStack or similar virtualization/HCI platforms Container storage (Longhorn, Ceph) and datacenter networking (load balancing, ingress, VLAN) Auto-scaling (HPA, VPA, KEDA, cluster auto scaler ) and capacity/cost planning Experience building Kubernetes operators/CRDs German language skills Certifications (CKA, CKS) are welcome but no substitute for hands-on experience – in the tech interview we'll ask about what you've actually built and operated.

You don't tick every box – or your title was never “SRE”? Apply anyway. If you've owned production systems, handled incidents and worked deeply with Kubernetes, we want to hear from you – production experience and engineering mindset matter more to us than titles or buzzwords.

Impact from day one: Your work directly influences the revenue of leading eCommerce brands across Europe. Modern tech stack: Kubernetes, Harvester, GitOps, auto-scaling, and an exciting path toward the cloud – with room to build things right. AI-first mindset: We use AI as a real part of our daily work, not as a buzzword. Ownership & growth: Clear responsibility, short decision paths, and the opportunity to actively shape your role. Flexible work: Hybrid work model three office days per week with a focus on outcomes. Strong team: Experienced engineers, an open feedback culture, and an environment where reliability is treated as a real engineering discipline.

Berlin, Munich, Pforzheim or Stockholm (all Hybrid)