Job Description

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide.

Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves.

About Five9

Five9 is a leading provider of cloud software for the enterprise contact center market, bringing the power of the cloud to thousands of customers and facilitating more than three billion customer interactions annually. Since 2001, Five9 has led the cloud revolution in contact centers, helping organizations transition from legacy premise‑based solutions to secure, scalable, and reliable cloud platforms.
Our mission is to enable exceptional customer experiences by delivering highly reliable, secure, and innovative cloud solutions.

About the Role

We are seeking a Senior Kubernetes Engineer to help design, build, and operate our on‑premises and hybrid Kubernetes platform. This role is part of the Platform Engineering and Infrastructure Reliability teams and focuses on running Kubernetes at scale in bare‑metal and integrated environments.

You will work extensively on automation, observability, performance tuning, and security to ensure our platform is resilient, maintainable, and ready for mission‑critical workloads.

Key Responsibilities

• Deploy and operate enterprise‑scale on‑premises Kubernetes clusters
• Automate cluster lifecycle and application delivery using Terraform, Helm, and GitOps tooling
• Tune Kubernetes clusters for performance on bare‑metal hardware (CPU, memory, networking, storage).
• Implement Kubernetes security best practices including RBAC, Pod Security, and Network Policies.
• Build and maintain monitoring and alerting using Prometheus, Grafana, and centralized logging stacks.
• Participate in incident response, postmortems, and continuous reliability improvements.

Required Qualifications

• 5+ years of experience in Infrastructure, Platform Engineering, or SRE roles.
• Strong hands‑on experience running Kubernetes on‑premises in production
• Solid understanding of Linux systems, networking fundamentals, and container runtimes.
• Experience with automation and GitOps tooling such as Terraform, Helm, Argo CD, or similar.
• Familiarity with observability platforms including Prometheus, Grafana, and ELK/EFK stacks
• Ability to troubleshoot and optimize Kubernetes clusters at scale.

Preferred Qualifications

• Experience integrating Kubernetes with OpenStack
• Exposure to Rancher and related add‑ons (Fleet, Longhorn, CIS Scanning).
• Understanding of compliance‑driven environments (PCI, SOC2, FedRAMP).
• Certifications such as CKA, CKS, or equivalent.

Why This Role Matters

This role is central to shaping how Five9 builds, deploys, and operates Kubernetes at scale—across bare metal, hybrid, and production environments.
As a key technical leader bridging Platform Engineering and Infrastructure, you will influence automation standards, security posture, observability practices, and performance optimization across the organization.

You will help define the foundation that Five9 engineering teams rely on to deliver reliable, high‑performance, customer‑critical services.

Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills.  The more inclusive we are, the better we are.  Five9 is an equal opportunity employer.

View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal

Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.