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. 

Our Engineering team built the world's largest cloud security platform from the ground up, and we keep building. With more than 100 patents and big plans for enhancing services and increasing our global footprint, the team has made us and our multitenant architecture today's cloud security leader, with more than 15 million users in 185 countries. Bring your vision and passion to our team of cloud architects, software engineers, security experts, and more who are enabling organizations worldwide to harness speed and agility with a cloud-first strategy.

We're looking for an experienced Staff /Principal Performance Engineer to join our Browser Isolation team. Reporting to the Manager Performance Engineer. Location would be any of Hyderabad, Bangalore or Mohali in Hybrid Mode. You will:

  • Develop utilities to analyze performance metrics and work with System Architects and DevOps to provide fixes.
  • Develop, design, perform load, stress and scalability flows to validate system performance and stability.
  • Provide technical assistance to improve system performance, capacity, reliability and scalability.
  • Identify areas/components that are critical to system performance, performance KPIs
  • Analyze results to identify system inefficiencies and suggest optimizations to address the same.
  • Develop, document, and maintain the performance strategy and performance scenarios
  • Assist in the design, development and support of software needed for performance engineering
  • Generate periodic performance engineering data for stakeholders to review

What We're Looking for

  • 10+ years of experience in Performance Engineer
  • Good development skills in any of the following languages: Python, Go, Java or JavaScript
  • Develop and convert customer issues to performance engineering scripts
  • Experience in performance engineering of REST APIs and microservice architecture.
  • Experience using diagnostic tools like HTTP Watch, Fiddler IE and Chrome Developer Tools.
  • Good experience in Kubernetes, AWS and DevOps skills.
  • You will don't have Managerial responsibilities but you should be able to mentor and guide your team.
  • Experience developing and running large scale performance flows in a distributed architecture/environment
  • Experience in profiling, and tracing

#LI-MS6

#LI-Hybrid

At Zscaler, we believe that diversity drives innovation, productivity, and success. We are looking for individuals from all backgrounds and identities to join our team and contribute to our mission to make doing business seamless and secure. We are guided by these principles as we create a representative and impactful team, and a culture where everyone belongs. For more information on our commitments to Diversity, Equity, Inclusion, and Belonging, visit the Corporate Responsibility page of our website.

Our Benefits program is one of the most important ways we support our employees. Zscaler proudly offers comprehensive and inclusive benefits to meet the diverse needs of our employees and their families throughout their life stages, including:

  • Various health plans
  • A flexible time off policy
  • Parental leave options
  • Retirement options
  • Education reimbursement
  • In-office perks, and more!

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.

Apply for this Job

* Required
resume chosen  
(File types: pdf, doc, docx, txt, rtf)
cover_letter chosen  
(File types: pdf, doc, docx, txt, rtf)


Voluntary Self Identification

At Zscaler, we value diversity, equity, inclusion and belonging. We invite you to voluntarily respond to the question(s) below to help us measure the effectiveness of our outreach and recruitment. Responding is entirely voluntary and will not impact your application process. All responses will be kept confidential and handled in accordance with applicable privacy laws. Thank you for helping us create a more inclusive workplace.

Sex (Select one) *




Enter the verification code sent to to confirm you are not a robot, then submit your application.

This application was flagged as potential bot traffic. To resubmit your application, turn off any VPNs, clear the browser's cache and cookies, or try another browser. If you still can't submit it, contact our support team through the help center.