Senior Site Reliability Engineer – Compute Platforms

Five9•Irving, TX

13h•$90,700 - $252,200•Hybrid

About The Position

Five9 is seeking a highly experienced Site Reliability Engineer to design, implement, and support Kubernetes on bare-metal and hypervisor platforms in a private cloud environment. The role is responsible for the architecture, design, and standardization of enterprise compute and hypervisor environments across bare-metal infrastructure, operating systems, hypervisors, private cloud orchestration, and Kubernetes, using Infrastructure-as-Code and GitOps practices. This is a deeply technical role requiring expert-level understanding of compute hardware management, Kubernetes, OpenStack, hypervisors, and extensive working knowledge of Linux operating systems. The engineer will collaborate with platform and SRE teams to maintain secure, performant, multi-tenant-isolated services for high-throughput, mission-critical applications. The position is hybrid, with three days a week (Tuesday, Wednesday, and Thursday) required in the Dallas office.

Requirements

At least 6 years of experience in infrastructure engineering, platform engineering, or DevOps, with a strong focus on compute system design.
Proven experience designing and automating bare-metal compute environments at scale.
Strong hands-on experience with PXE boot, network-based operating system provisioning, and automated server imaging.
Experience implementing or supporting Bare Metal as a Service (BMaaS) platforms.
Practical experience using Redfish APIs for hardware provisioning, power management, and remote lifecycle operations.
Deep expertise with Ubuntu Linux in enterprise environments.
Strong hands-on experience with KVM hypervisors, including SUSE Harvester and OpenStack.
Experience designing and deploying production-grade Kubernetes clusters.
Strong background with enterprise compute hardware platforms, including Cisco UCS, Dell PowerEdge, Supermicro systems, and HPE.
Proficiency with Infrastructure-as-Code tools such as Terraform, Ansible, or similar tools.
Experience building or supporting CI/CD pipelines for infrastructure and platform automation.
Strong scripting skills in Python, Bash, or similar languages.
Ability to produce clear, structured technical design documentation.
Excellent written and verbal communication skills.
Bachelor’s degree in computer science or equivalent professional experience.
Analytical thinking and problem-solving skills to translate complex, cross-domain requirements into scalable and resilient cloud infrastructure and automation solutions.
Strong interpersonal and communication skills and a demonstrated record of collaboration across developers, operations, security, and product stakeholders.
Knowledge-sharing and mentorship skills, including experience guiding junior engineers and fostering continuous learning, innovation, and technical excellence in cloud engineering and DevOps practices.
Ability to work in the Dallas office three days per week (Tuesday, Wednesday, and Thursday).

Nice To Haves

OpenStack and Ubuntu KVM administration.
Bare Metal as a Service experience, including PXE and Redfish.
Kubernetes on bare metal.
CIS/NIST security and infrastructure lifecycle management.
ITIL Foundation or advanced certifications supporting ITSM methodology.
Background in telecommunications, edge cloud, or large enterprise environments.
Ubuntu certifications, CNCF Certified Kubernetes Administrator (CKA), or Certified Kubernetes Security Specialist (CKS).
Master’s degree in computer science, IT, engineering, or a related field; equivalent experience and relevant industry certifications will also be considered.

Responsibilities

Lead architecture and design of enterprise compute and hypervisor platform solutions across hardware, operating systems, virtualization, cloud orchestration, and container orchestration layers.
Define standards and automation frameworks for bare-metal provisioning and lifecycle management.
Design and implement Bare Metal as a Service (BMaaS) capabilities for scalable infrastructure consumption.
Architect and design Kubernetes platforms on bare metal with QoS and Affinity (ArgoCD).
Architect and validate automated deployments of operating systems and hypervisors, including Ubuntu and Harvester.
Design and maintain PXE-based provisioning environments using Redfish APIs for large-scale server deployments.
Develop Infrastructure-as-Code using Ansible, Terraform, Helm, and Git, along with Python/Bash automation.
Implement CI/CD pipelines for infrastructure updates, patching, upgrades, testing, and rollback.
Design automated workflows for server builds, firmware lifecycle management, patching, and hardware validation.
Evaluate and standardize enterprise hardware platforms to meet performance, scalability, and reliability requirements.
Produce high-level and low-level design documentation, build guides, and operational handoff materials.
Perform in-depth troubleshooting across storage, Kubernetes, hypervisors, networking, and Linux systems.
Partner with operations, network, storage, and platform teams to ensure designs are supportable and production-ready.
Participate in on-call escalation support for complex platform-related issues.
Collaborate globally on change management, documentation, and operational best practices.
Collaborate across multidisciplinary teams, share knowledge, and mentor junior engineers.

Benefits

Annual performance bonus, stock, and/or other applicable incentive compensation plans may be included.
Health, dental, and vision coverage beginning on the first day of employment; Five9 covers 100% of the employee portion and shares a high portion of dependent costs.
Short- and long-term disability coverage.
Basic life insurance.
401(k) savings plan with employer matching.
Mental health support platform offering therapy, coaching, and self-guided mindfulness resources for covered employees and dependents.
Employee stock purchase plan.
Paid time off.
Company-paid holidays.
Paid volunteer hours.
12 weeks of paid parental leave.
Collaborative team focused on infrastructure excellence.
Opportunity to work on complex technical challenges and shape a next-generation private cloud platform.
Access to current tools, frameworks, and upstream project developments.