Senior Cloud Infrastructure Engineer

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. We are seeking a highly experienced Senior Cloud Infrastructure Engineer to design, implement, and support Software Defined Storage (SDS) and Kubernetes platforms in a private cloud environment. This role focuses on scalability, resilience, automation, and performance using Infrastructure-as-Code and GitOps practices. This is a deeply technical role requiring expert-level understanding of Software Defined Storage, Kubernetes and extensive working knowledge on Linux Operating systems. You will also collaborate with platform and SRE teams to maintain secure, performant, and multi-tenant-isolated services that serve high-throughput, mission-critical applications. Key Responsibilities: Design, implement, and operate large-scale Software Defined Storage architectures across private and public cloud regions. Deploy and support enterprise storage platforms (Pure Storage, HPE, NetApp) and SDS solutions (Ceph, Longhorn). Build and operate multi-tenant Kubernetes clusters on bare metal using SDS-backed storage. Develop Infrastructure-as-Code using Ansible, Terraform or Pulumi, with Python/Bash automation. Implement CI/CD pipelines for infrastructure updates, patching, upgrades, testing, and rollback. Build observability, alerting, and auto-remediation using GitOps and tools such as Prometheus, Loki, and Grafana. Architect and maintain high availability, disaster recovery, and scale-out infrastructure. Perform deep troubleshooting across storage, Kubernetes, hypervisors, networking, and Linux systems. Participate in on-call rotations, incident response, and root cause analysis. Collaborate globally on change management, documentation, and operational best practices. Requirements: 6+ years of experience managing enterprise storage and Kubernetes platforms on Linux. Strong hands-on experience with SDS solutions (Ceph, Longhorn) and storage migrations from legacy systems. Experience with block, file, and object storage, including Fibre Channel and IP-based protocols. Expert knowledge of Kubernetes and Linux systems (Ubuntu, RHEL/CentOS). Proficiency with Infrastructure-as-Code (Ansible, Terraform, or Pulumi). Strong scripting skills in Python, Bash, or Go. Deep experience with enterprise DNS (Infoblox DDI, BIND, cloud DNS platforms). Experience operating 24x7 mission-critical production environments. Hands-on experience with hypervisors (vSphere and/or KVM). Strong written and verbal communication skills. Proficiency with Git, CI/CD pipelines, and automated testing frameworks Ability to write technical documentation and contribute to community wikis or knowledge bases. Bachelor’s degree in computer science or equivalent professional experience. Preferred Qualifications Good understanding of overall Enterprise Common Infrastructure service implementations with a focus on SDS & Kubernetes. Understanding of security best practices for system patching and security compliance (e.g., CIS, NIST). Background in telco, edge cloud, or large enterprise infrastructure environments. Bachelor’s degree in computer science, IT, Engineering, or a related field preferred; equivalent experience and relevant industry certifications will also be considered. What You’ll Get A collaborative team that’s deeply invested in infrastructure excellence. Complex technical challenges that require creative, scalable solutions. The opportunity to shape a next-generation private cloud platform-built reliability. Access to the latest tools, frameworks, and upstream project developments. Skills and Attributes: Analytical Thinking & Problem Solving: Demonstrated ability to translate complex, cross-domain requirements into scalable and resilient cloud infrastructure and automation solutions. Collaboration & Teamwork: Strong interpersonal and communication skills with a proven track record of effective collaboration across multidisciplinary teams, including developers, operations, security, and product stakeholders. Mentorship & Leadership: Passionate about knowledge-sharing and mentorship, with experience guiding junior engineers and fostering a team culture of continuous learning, innovation, and technical excellence in cloud engineering and DevOps practices. Work Location: This role is fully remote for candidates who reside outside the 50 mile radius of our San Ramon office. For candidates who reside within 50 miles of our San Ramon location, this role is Hybrid and would require 3 days a week (M, W, TH) in our San Ramon office. As part of our continued commitment to diversity, equity, and inclusion, Five9 supports pay transparency during the entire recruitment process. Actual compensation packages are based on several factors that are unique to each candidate including, but not limited to: skill set, depth of experience, certifications, and specific work location. The range displayed reflects the minimum and maximum target for new hire salaries for the job across the United States. Your recruiter can share more about the specific compensation package during your hiring process. Additionally, the total compensation package for this position may also include an annual performance bonus, stock, and/or other applicable incentive compensation plans. Our total reward package also includes: Health, dental, and vision coverage, beginning on the first day of employment. Five9 covers 100% of the employee portion of the health, dental and vision coverage and shares a high portion of the dependent cost. We also offer Short & Long-Term Disability, Basic Life Insurance, and a 401k saving plan with employer matching. Access to an innovative mental health support platform that offers personalized care and resources in areas such as: therapy, coaching and self-guided mindfulness exercises for all covered employees and their covered dependents. Generous employee stock purchase plan. Paid Time Off, Company paid holidays, paid volunteer hours and 12 weeks paid parental leave. All compensation and benefits are subject to the requirements and restrictions set forth in the applicable plan documents and any written agreements between the parties. The US base salary range for this role is below. $83,800 — $200,600 USD 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.