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. 

About the Role 

We are seeking a highly experienced Cloud Infrastructure Engineer to implement and support our current and future DNS architecture in private/public cloud. You will be directly responsible for ensuring the scalability, resilience, automation, and performance optimization of our DNS environment by leveraging Infrastructure-as-Code (IaC) tools like Ansible, and Terraform, or Pulumi. 

This is a deeply technical role requiring expert-level understanding of DNS, NTP, LDAP 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. 

This position is based out of one of the offices of Five9 in India, and will adopt the hybrid work arrangements of that location. You will be collaborating with global teammates based primarily in the United States.

Key Responsibilities 

• Implement and support large scale DNS Architecture that stretches private & public cloud across multiple regions.
• Implement and support Infoblox DDI solutions (DNS, IPAM, DHCP), Cloudflare DNS management, Google & AWS DNS services.
• Implement and support highly reliable NTP and LDAP services on Linux instances.
• Implement Infrastructure as code leveraging CI/CD automation, Ansible, Terraform/Pulumi, Python and Bash for automated provisioning of DNS services.
• Be involved in Change management and Global team collaboration
• Implement continuous delivery pipelines for Infrastructure updates, including patch management, service upgrade testing, and rollback procedures.
• Develop automated monitoring, alerting, and healing mechanisms using GitOps principles and observability stacks (e.g., Prometheus, Loki, Grafana).
• Harden services for high availability, disaster recovery, and scale-out operations.
• Perform deep-dive troubleshooting and performance analysis of Infrastructure services across hypervisors, backend storage protocols and networking layers.
• Participate in on-call rotation, incident response, and root cause analysis for platform reliability issues.

Minimum Qualifications 

• 5+ in managing global DNS, NTP and LDAP systems on Linux Operating Systems.
• Proficiency in Infrastructure-as-Code with Ansible, Terraform, or Pulumi.
• Expertise with Infoblox DDI systems (or similar enterprise DNS systems), Bind9, CloudFlare, GCP and AWS DNS
• Working experience implementing OpenLDAP & NTP services (preferably Microchip SyncServer systems).
• Strong Linux (RHEL/CentOS/Ubuntu) systems engineering background with advanced scripting in Python, Bash, or Go.
• Familiar with Cisco UCS Blade Servers (or similar server Infrastructure), Block/File Storage (Soft defined storage preferred).
• Fluency with Git, CI/CD pipelines, and automated test frameworks.
• Familiar with various Infrastructure technology stacks like Hypervisor Technologies (KVM, Vsphere,), storage protocols (SDS) (iSCSI, NFS, CEPH), L2/L3 Networking
• Strong experience supporting mission critical 24x7 customer facing production environments.
• Demonstrated success building or maintaining multi-region or high-availability OpenStack clusters.
• Ability to write technical documentation and contribute to community wikis or knowledge bases.

Preferred Qualifications 

• Good understanding of overall Enterprise Common Infrastructure service implementations with focus on DNS, NTP & LDAP.
• 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.
• Experience building and maintaining automated test environments for system upgrades and DNS migrations.
• 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.

Employment Type 

Full-Time, Remote or Hybrid 

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:   

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