Senior Cloud Platform 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.

Sr Cloud Platform Engineer, Cloud Platform About the Role

What You Will Do

Design, implement, and maintain end-to-end IaC pipelines for the email service using Terraform and OpenTofu, covering provisioning, configuration, and teardown.

Deploy and operate email service infrastructure on OpenStack and Rancher-managed Kubernetes clusters.

Build and maintain CI/CD pipelines for infrastructure delivery and service rollouts, ensuring zero-downtime deployments.

Define and enforce networking, DNS, TLS, and IP reputation configurations required for reliable email delivery (SPF, DKIM, DMARC).

Implement observability stacks (metrics, logging, alerting) for email throughput, delivery rates, bounce/spam rates, and queue health.

Manage secrets, credentials, and access controls using secrets management tooling and RBAC across environments.

Collaborate with backend engineers to define infrastructure contracts and service interfaces.

Conduct capacity planning, load testing, and incident response for the email platform.

Produce clear IaC documentation, runbooks, and disaster recovery playbooks.

What We Are Looking For

6+ years of hands-on DevOps or platform engineering experience in production environments.

Strong proficiency in Terraform and/or OpenTofu, including module design, state management, and remote backends.

Solid experience with OpenStack and/or Rancher for container orchestration and VM workload management.

Working knowledge of Kubernetes, Helm, and cloud-native deployment patterns.

Experience with email infrastructure specifics: MTA configuration, SMTP relay, bounce handling, deliverability tuning.

Proficiency in at least one scripting language (Python, Bash, or Go) for automation and tooling.

Familiarity with GitOps workflows and infrastructure drift detection.

Strong understanding of networking fundamentals: DNS, TCP/IP, load balancing, firewall rules.

Nice to Have

Experience with open-source email platforms such as Postfix, Haraka, or similar MTAs.

Exposure to message queue systems such as RabbitMQ or Kafka for high-volume email dispatching.

Knowledge of email compliance and deliverability standards (CAN-SPAM, GDPR, ISP feedback loops).

Prior experience building internal platform teams or shared infrastructure services.

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