Principal Site Reliability Engineer

Zscaler•San Jose, CA

6d•Hybrid

About The Position

About Zscaler Zscaler accelerates digital transformation to ensure our customers can be more agile, efficient, resilient, and secure. As an AI-forward enterprise, we are constantly pushing the envelope, leveraging the world’s largest security data lake to power our cloud-native Zero Trust Exchange platform. This innovation protects our customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Here, impact in your role matters more than title and trust is built on results. We say, impact over activity. We seek innovators who actively use AI to amplify their impact and who thrive in an environment where we leverage intelligent systems to stay ahead of evolving threats. We believe in transparency and value constructive, honest debate —we’re focused on getting to the best ideas, faster. We build high-performing teams that can make an impact quickly and with high quality. To do this, we are building a culture of execution centered on customer obsession, collaboration, ownership, and accountability. We value high-impact, high-accountability with a sense of urgency where you’re enabled to do your best work and embrace your potential. If you’re driven by purpose, thrive on solving complex challenges, and want to be part of the team that’s helping to secure the AI age, we invite you to bring your talents to Zscaler and help shape the future of cybersecurity. Role We are looking for a Principal Site Reliability Engineer to join our Infrastructure services and architecture team. This role is hybrid 3 days a week onsite in San Jose, CA, or can be remote reporting to the Senior Manager, Cloud Operations. As a lead engineer, you will leverage deep expertise in IaC/CaC, Linux virtualization, and physical hardware management to drive our infrastructure forward. You will oversee networking services and general software engineering to ensure our systems remain scalable, resilient, and high-performing.

Requirements

Expert-level proficiency with Kubernetes
Deep professional experience with Terraform and Ansible
Expert-level programming skills in Python or Go
Hands-on experience with Enterprise Linux distributions such as Rocky, Red Hat, or Alma
Proven experience using Git within a structured SDLC
U.S. citizenship due to the nature of the customers assigned to this role

Nice To Haves

Deep knowledge of Linux Hypervisors, including OpenStack, Proxmox, libvirt, or QEMU
Technical experience working with FreeBSD
Familiarity with Identity Access Management tools like HashiCorp Vault, LDAP, or OIDC

Responsibilities

Mentor junior engineers and lead high-impact infrastructure projects
Support business operations by responding to alerts and triaging systems to restore mission-critical capabilities
Ensure the reliability and performance of all customer-facing services
Design, document, and build technical solutions that align with evolving organizational needs
Support Agile processes to maintain high velocity and a collaborative environment