Staff Software Engineer (Testing, Automation & Networking)

Zscaler•San Jose, CA

8h•Hybrid

About The Position

Zscaler accelerates digital transformation to ensure customers can be more agile, efficient, resilient, and secure. As an AI-forward enterprise, Zscaler leverages the world’s largest security data lake to power its cloud-native Zero Trust Exchange platform, protecting customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. The company values impact over title, trust built on results, and seeks innovators who use AI to amplify their impact. Zscaler fosters an environment of transparency, constructive debate, and high-performing teams focused on customer obsession, collaboration, ownership, and accountability. This role is for a Staff Software Development Engineer to join the Client Connector Team in a hybrid capacity (San Jose - 3 days/week), reporting to the Director of Engineering. The Staff Software Engineer for Test and Automation will be responsible for the end-to-end quality and delivery of features targeting Windows and Linux devices, requiring 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