Key skills
KubernetesOpenStackTerraformSRE PrinciplesCertified Kubernetes AdministratorLinux internalsObservability platformsAnsibleHelmArgo CDPythonGoBashRancherPrometheusGrafanaGitOps
About this role
Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. The Senior DevOps Engineer will lead the lifecycle of OpenStack and Rancher-managed Kubernetes environments, ensuring scalable, secure, and observable foundations that support mission-critical workloads.
Responsibilities:
- Kubernetes (Rancher RKE2/K3s): Designing and maintaining bare-metal clusters with GitOps-driven automation (Fleet, Argo CD, Terraform, Helm), optimized for performance and secured with RBAC, network policies, and compliance guardrails
- OpenStack: Designing, automating, and operating multi-tenant clusters across Nova, Neutron, Octavia, Manila, Cinder, Ironic, and Glance, ensuring performance, tenant isolation, and lifecycle automation
- Cross-Platform Integration: Enabling interoperability (e.g., Magnum, storage backends, network overlays) and shared observability stacks (Prometheus, Grafana, Loki/EFK)
- SRE Principles: Applying uniform practices across both stacks for capacity planning, high availability, resilience, incident response, and continuous improvement
Requirements:
- 7+ years in infrastructure, platform, or SRE engineering roles
- Certified Kubernetes Administrator (CKA)
- Hands-on mastery of both OpenStack and Rancher Kubernetes in production, with focus on automation, lifecycle management, and high availability
- Proficiency with Terraform, Ansible, Helm, Argo CD, and scripting in Python/Go/Bash
- Deep understanding of Linux internals and system performance
- Proven application of SRE practices in high-stakes, always-on environments
- Strong experience with observability platforms (Prometheus, Grafana, Loki/ELK/EFK)
- Kubernetes: Rancher add-ons (Fleet, Longhorn, CIS Scanning), security hardening (CKA/CKS)
- Advanced networking and scheduling: VXLAN, BGP, NIC offload, NUMA-aware scheduling, SR-IOV, and PCI passthrough
- OpenStack: Magnum integration, Tempest/Rally for upgrades and validation
- Compliance: PCI, FedRAMP, SOC2, FIPS, CIS, NIST standards
- Upstream contributions to OpenStack or Kubernetes projects