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 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 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 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