Staff Software Engineer (Testing, Automation & Networking)

Zscaler•San Jose, CA

7d•Hybrid

About The Position

Zscaler is a pioneer and global leader in zero trust security. The world’s largest businesses, critical infrastructure organizations, and government agencies rely on Zscaler to secure users, branches, applications, data & devices, and to accelerate digital transformation initiatives. Distributed across more than 160 data centers globally, the Zscaler Zero Trust Exchange platform combined with advanced AI combats billions of cyber threats and policy violations every day and unlocks productivity gains for modern enterprises by reducing costs and complexity. Here, impact in your role matters more than title and trust is built on results. 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 champion an “AI Forward, People First” philosophy to help us accelerate and innovate, empowering our people to embrace their potential. If you’re driven by purpose, thrive on solving complex challenges and want to make a positive difference on a global scale, we invite you to bring your talents to Zscaler to help shape the future of cybersecurity. We are looking for a Staff Software Development Engineer to join our Client Connector Team in a hybrid capacity (San Jose - 3 days/week), reporting to the Director of Engineering. Join the Zscaler Client Connector team as a Staff Software Engineer for Test and Automation. You will be responsible for the end-to-end quality and delivery of features targeting Windows and Linux devices. This role requires strong automation development skills, deep networking knowledge, and expertise in observability to ensure product reliability and performance in a fast-paced security environment.

Requirements

5+ years of engineering experience with hands-on automation framework design and development in Python, including proficiency with Jenkins and GitLab
Proven track record of test automation across both Windows and Linux platforms
Deep networking knowledge of TCP/IP, protocols (SSL/TLS, HTTPS), and components like proxies or VPNs, plus experience testing network security products and authentication systems
Expertise in troubleshooting and analyzing network logs using Wireshark and tcpdump within an Agile environment
Graduate or Master’s degree in Computer Science or a related field with professional experience as a QA or Test Automation Engineer in networking and security

Nice To Haves

Hands-on experience building monitoring dashboards and defining service health metrics using Grafana, Prometheus, or ELK
Experience setting up testbeds in virtualized environments or knowledge of cloud platforms like AWS and GCP
Strong understanding of REST APIs, hypervisors, and microservices architecture

Responsibilities

Own end-to-end quality and delivery of new features for Zscaler Client Connector on Windows and Linux, collaborating with Development, Product Management, and Cloud Operations from design through release
Translate requirements into comprehensive test strategies and plans to design and execute functional, system, and automated test suites
Build and maintain a scalable Python-based automation framework and implement CI/CD pipelines for efficient, reliable test execution and reporting
Define and operate system health monitoring and alerting while developing Grafana dashboards for actionable insights into product health, performance, and stability
Analyze results and troubleshoot complex issues to root cause while championing Agile practices, continuous QA improvement, and an inclusive team culture