About Zscaler

Serving thousands of enterprise customers around the world including 40% of Fortune 500 companies, Zscaler (NASDAQ: ZS) was founded in 2007 with a mission to make the cloud a safe place to do business and a more enjoyable experience for enterprise users. As the operator of the world’s largest security cloud, Zscaler accelerates digital transformation so enterprises can be more agile, efficient, resilient, and secure. The pioneering, AI-powered Zscaler Zero Trust Exchange™ platform protects thousands of enterprise customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. 

Named a Best Workplace in Technology by Fortune and others, Zscaler fosters an inclusive and supportive culture that is home to some of the brightest minds in the industry. If you thrive in an environment that is fast-paced and collaborative, and you are passionate about building and innovating for the greater good, come make your next move with Zscaler. 

Key Responsibilities include

  • Collaborate with cross-functional teams during design, development, and maintain cloud-based software solutions. 
  • Working experience in testing L4-L7 technology, must be well versed in cloud firewall and/or tunneling technologies
  • Build repeatable system level automation suites to validate L4-L7 technologies
  • Focus on testing at scale, with ability to push the limits of software under test and proficient coding using Python to automate testing
  • Excellent troubleshooting skills to diagnose customer issues and take ownership of issue resolution. Recreation of production issues, and providing necessary work around for resolution
  • Mentor and guide junior engineers and take full ownership of features.
  • Skilled to architect, design, develop and maintain a system test automation infrastructure for a cloud product processing 400B transaction per day. 
  • Ability to understand the breath of the product and craft scenarios and simulate triggers mimicking deployment scenarios 
  • Know how of tools like traffic generator and performance test tools, fuzz would be a plus 
  • Ability to monitor the incoming and past customer issues and incorporate it a test plan 
  • Continuously looks to optimize the regression cycle. 
  • Ability to create and maintain a traceability matrix of test cases to feature offering 
  • Provide insights and recommendations to the development team to enhance the RAS and debug feature of the product 


  • 10+ years of overall experience
  • Strong programming skills in Python.
  • Tools Development: Build and maintain tools and utilities to support the testing and development process, improving efficiency and productivity.
  • Test Automation: Develop and maintain robust and scalable test automation frameworks for our cloud security products, covering various layers of the software stack.
  • Solid understanding of TCP/IP protocol stack, HTTP(S), TLS, PKI and other related protocols and products (DNS, DHCP, VPN, HA, routing and switching)
  • Strong exposure to different tunneling methods like IPSEC/GRE
  • Strong background in expertise on L3, L4 and L7 filtering policies
  • Experience in Load balancers, IPS/IDS, Routers
  • Good knowledge of Cloud platforms (ex: Azure, AWS), Networking, HTTP/HTTPS.
  • Must have excellent understanding of manual and automated, functional, integration, and performance testing processes.F
  • Strong Debugging/Troubleshooting skills to debug/handle complex Network Infrastructure/HTTP/SSL/Firewall problems in customer environments.
  • Quality Assurance: Create, execute, and maintain comprehensive test plans and test cases to identify issues, validate product functionality, and ensure product quality.
  • Performance Testing: Design and implement performance and load testing strategies to evaluate the efficiency and scalability of our cloud security solutions.
  • Scale Testing: Work on testing methodologies and tools to simulate and validate the performance and scale of our systems under different scenarios.
  • BS/MS degree  (Engineering/Computer Science)
  • Self-starter takes initiative & ownership, identifies and completes tasks; goal driven
  • Ability to work with remote teams, handle multiple tasks, prioritize and meet deadlines
  • Familiar with complete software development cycle


By applying for this role, you adhere to applicable laws, regulations, and Zscaler policies, including those related to security and privacy standards and guidelines.

Zscaler is proud to be an equal opportunity and affirmative action employer. We celebrate diversity and are committed to creating an inclusive environment for all of our employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy or related medical conditions), age, national origin, sexual orientation, gender identity or expression, genetic information, disability status, protected veteran status or any other characteristics protected by federal, state, or local laws.

See more information by clicking on the Know Your Rights: Workplace Discrimination is Illegal link.

Pay Transparency

Zscaler complies with all applicable federal, state, and local pay transparency rules. For additional information about the federal requirements, click here.

Zscaler is committed to providing reasonable support (called accommodations or adjustments) in our recruiting processes for candidates who are differently abled, have long term conditions, mental health conditions or sincerely held religious beliefs, or who are neurodivergent or require pregnancy-related support.

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