Senior Software Engineer applicants have rated the interview process at Zscaler with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 50% positive. To compare, the company-average is 53.4% positive. This is according to Glassdoor user ratings.
Common stages of the interview process at Zscaler as a Senior Software Engineer according to 2 Glassdoor interviews include:
One on one interview: 50%
Phone interview: 50%
Here are the most commonly searched roles for interview reports -
I applied online. I interviewed at Zscaler (Chandigarh)
Interview
Their recruiter is very unreliable. HR does not respect your time and keeps you waiting for long. Also if you haven't got selected their HR will ask you to leave without any update and ask you to wait for the call which you will never get.
This is a reflection of the company and how they operate.
I will never work at a place like that.
Interview questions [1]
Question 1
They will not ask questions based on your experience and work. Some questions are totally irrelevant and frustrating.
Thank you for taking the time to share your feedback on your interview experience. I am disappointed that your experience was not positive, and on behalf of Zscaler, my apologies to you for your negative experience.
Would you mind contacting me directly so that I might address this situation specifically with those who were involved? I was not able to track down your specific situation with our head of HR in Chandigarh. You may reach me at msmith@zscaler.com.
Other Senior Software Engineer Interview Reviews for Zscaler
I applied online. I interviewed at Zscaler (Bengaluru) in Nov 2025
Interview
First technical round, started with networking questions then 2 coding problems and 1 system design problem - In system design question problem statement was open ended. Interviewer was not that friendly and helpful. I struggled on System design question.
I applied through a recruiter. The process took 5 weeks. I interviewed at Zscaler in Apr 2025
Interview
The overall interview process was fairly standard. It began with an HR round that lasted around 15–20 minutes, followed by three technical rounds. I believe I performed well throughout, and I was informed afterward that the feedback from the technical rounds was positive.
However, despite the encouraging feedback, I was later told by the HR representative that the position had been elevated to a more senior role, and the team felt I would not be the right fit for this updated requirement.
While I appreciate the opportunity to interview, I was disappointed with the outcome—especially after receiving positive feedback and investing significant time and effort. Clearer communication regarding potential changes to the role earlier in the process would have been helpful and more respectful of candidates’ time and expectations.
Interview questions [1]
Question 1
Networking, previous projects and tech stacks used along with some DSA questions
I applied through an employee referral. I interviewed at Zscaler (San Jose, CA)
Interview
There were 3 rounds in total
- There were 2 rounds of coding/system design with Principal Engineers
They also discussed one project in detail
- There was 1 hiring manager round, where we discussed previous projects
Interview questions [1]
Question 1
Data structures and general knowledge on software technologies