Senior IaaS / Kubernetes Platform Engineer

🕒 April 24

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CloudLinux

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2009

☁️ SaaS

🔐 Security

🌐 Web 3

SaaS • Security • Web 3

CloudLinux is a leading provider of operating systems designed specifically for web hosting environments. The company offers a line of products including CloudLinux OS Legacy, CloudLinux OS Shared Pro, and CloudLinux OS Solo, each tailored to improve server stability, security, and performance. With features such as kernel live patching, advanced automation and monitoring tools, and specialized WordPress optimization, CloudLinux helps hosting companies maximize security and profitability while ensuring stable server environments. Over 4,000 companies trust CloudLinux to power millions of websites worldwide, benefitting from increased stability and reduced churn rates. The company emphasizes compatibility with major hosting control panels and CentOS, offering solutions for shared hosts, agencies, and small businesses.

📋 Description

• Design, build, and operate a multi-tenant Kubernetes platform using Cluster API (CAPI) with bare-metal providers (Metal3/Sidero). • Implement hard multi-tenancy using vCluster (Loft Labs) or similar technology, providing isolated Kubernetes API servers per tenant. • Deploy and manage KubeVirt for VM orchestration within Kubernetes, including CPU pinning, NUMA awareness, and HugePages configuration. • Implement GitOps-driven infrastructure using ArgoCD or Flux as the single source of truth for all cluster configurations. • Deploy and manage Policy-as-Code using Kyverno or OPA Gatekeeper for admission control, resource quotas, and security policies. • Build self-service capabilities using Crossplane or similar Kubernetes-native infrastructure provisioning tools. • Operate and optimize Ceph distributed storage clusters (currently 1 PiB raw, 149 OSDs, Quincy 17.2.5). • Manage Rook-Ceph operator deployments at scale on modern Kubernetes (v1.28+). • Implement storage tiering: Ceph for bulk storage, local NVMe for high-IOPS workloads, LINSTOR/DRBD or TopoLVM for ultra-fast replicated storage. • Deploy and manage overlay networks for pod networking, micro-segmentation, and WireGuard/IPsec encryption. • Practice SRE discipline: define and maintain SLOs with error budgets, implement proactive capacity management with 6-12 month forecasting. • Develop and maintain Terraform/OpenTofu modules for multi-cloud infrastructure provisioning. • Write Ansible playbooks for bare-metal server configuration and fleet management.

🎯 Requirements

• 5+ years in infrastructure/platform engineering roles, with at least 3 years operating production Kubernetes clusters (not just deploying apps on K8s, but building and managing the platform itself). • Production experience with at least 3 of the following: KubeVirt or similar VM-on-K8s technology, Cluster API (CAPI) for declarative cluster lifecycle management, Cilium or Calico (advanced CNI with eBPF or BGP integration), Rook-Ceph or other Kubernetes storage operators at scale (100+ OSDs), ArgoCD or Flux for GitOps-driven infrastructure management. • Deep Linux systems knowledge: kernel tuning, networking stack (iptables/nftables, routing, bonding, VLAN), filesystem operations, performance troubleshooting. • Ceph distributed storage experience: cluster operations, OSD lifecycle, pool management, performance tuning, troubleshooting degraded states. • Infrastructure as Code: Terraform/OpenTofu + Ansible at production scale. • Bare-metal infrastructure experience: IPMI/iDRAC, PXE boot, RAID configuration, hardware diagnostics, datacenter operations. • Networking fundamentals: BGP, VLAN, IPSec/WireGuard, DNS, load balancing. • Strong written and verbal English (B2+ minimum) — documentation, postmortems, and cross-team communication are in English. • Proactive mindset: demonstrated history of identifying problems before they become incidents and driving improvements without being asked.

🏖️ Benefits

• A focus on professional development. • Interesting and challenging projects. • Fully remote work with flexible working hours, that allows you to schedule your day and work from any location worldwide. • Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves. • Compensation for private medical insurance. • Co-working and gym/sports reimbursement. • Budget for education. • The opportunity to receive a reward for the most innovative idea that the company can patent.