Kubernetes & Cloud Integration Engineer (Rancher & RKE2 Specialist)

About the role

OpenNebula Systems, a European open source company helping organisations manage corporate data centres and build enterprise clouds, is hiring a Kubernetes & Cloud Integration Engineer in Europe. The engineer designs, integrates, deploys and maintains large-scale cloud-based solutions built on Rancher-managed RKE2 clusters across cloud, on-premises and edge environments, working on end-to-end lifecycle management from architecture and automation to operations and optimisation.

Key responsibilities

• Design, integrate and deploy Rancher-managed RKE2 clusters across cloud, on-premises and edge environments.
• Integrate and operate certified CNIs/CSIs for RKE2 such as Calico, Cilium, Canal, Multus and Longhorn.
• Develop and maintain automation for cluster lifecycle using Terraform, Ansible, Helm and GitOps.
• Manage networking, storage, upgrades, security hardening and HA configurations for large-scale RKE2 environments.
• Troubleshoot advanced issues across Kubernetes, Rancher Manager, RKE2, Linux and cloud infrastructure.
• Maintain the OpenNebula Kubernetes Cluster API Provider (CAPONE) and its storage provider (OpenNebula CSI driver).
• Support engineering teams and customers with solution design, issue escalation, demos and cloud-edge integration.
• Produce technical documentation, architecture diagrams, runbooks and procedural guides.

Required profile

• Bachelor's or Master's degree in Computer Science, Software Engineering, Telecommunications or a related discipline.
• Certifications such as CKA, CKAD, SUSE Rancher or equivalent are a strong plus.
• 3+ years of hands-on experience running Kubernetes in production environments.
• Experience with distributed, multi-site, cloud-edge or telecom-grade architectures, and deploying RKE2 or other hardened Kubernetes distributions.
• English fluency at a professional or native-equivalent level.

Required skills

• Deep expertise with RKE2, Rancher Manager and the Rancher ecosystem.
• Strong Linux engineering background, including debugging, networking, kernel-level troubleshooting and security hardening.
• IaC and automation: Terraform, Ansible, Helm, GitOps (Flux/ArgoCD).
• HA patterns, distributed systems and observability stacks (Prometheus, Grafana, Loki).
• Experience with Golang, Ruby and Bash, and Kubernetes controllers and Cluster API.

What we offer

• Competitive compensation with flexible remuneration options (meals, transport, nursery/childcare).
• Company-provided workstation and private health insurance.
• 6-hour Friday workday and holidays in August.
• PTO covering holidays, personal time, sick time and parental leave.
• Full-time, part-time, employee or contractor positions available.
• Digital disconnecting policy and a remote-first culture.