Zscaler Software Engineer interview questions and process

Updated 16 Oct 2026 · 14 sources

Hiring Pulse: where Zscaler candidates are right now

Dated status reports from public Reddit threads and anonymous PortLume reports, updated Oct 18. Not official Zscaler data.

1 status reports in the last 7 days
Not enough data yet: median from final interview to a decision shows at 5+ people
Latest movement: no decisions reported lately

Latest Zscaler hiring reports

Oct 17: Applied Oct 11 (r/Btechtards)

Candidates rate the Zscaler Software Engineer interview Medium-Hard: Reports describe a mix of networking and C fundamentals, medium-to-hard coding problems, and system design, which is a wide range to cover for a product company. Reports describe 5 rounds, from Online assessment (HackerRank) to Senior director / hiring manager round, with about About 1-2 weeks for campus hiring; lateral timelines are not clearly reported from first call to offer.

Difficulty: Medium-Hard
Estimated salary: fullstack roles at Zscaler show roughly Rs 11-12 LPA fixed at 1 year of experience and about Rs 34 LPA at 5 years
Skills asked about: Computer networking, JavaScript and React, Data structures and algorithms

Debrief your Zscaler interview free

No signup needed. See what likely went wrong in about 2 minutes.

Zscaler Software Engineer interview rounds

Online assessment (HackerRank): Reports describe 3-4 coding problems from medium to hard plus MCQs on core topics. Campus candidates reported about 2 hours; frontend-leaning candidates also saw HTML/CSS/JS MCQs and a DOM manipulation problem.
Technical round 1: networking, coding and design
Technical round 2: backend / frontend depth
System design and past-experience discussion
Senior director / hiring manager round

Questions reported in Zscaler Software Engineer interviews

Explain the differences between personal and enterprise-level VPNs, and describe how a VPN works in detail.
Explain the layers of the network model and the functionality of each.
What is the size of long long, a struct, a union, and a pointer to int or char in C?
Explain how JavaScript works and how execution happens in JS.
Implement a flat list function and build a React timer example.

Practise any of these with timed AI feedback and a full Zscaler mock: free account.

Zscaler Software Engineer interview: quick answers

How many rounds are in the Zscaler Software Engineer interview?

Public reports describe 5 rounds for the Zscaler Software Engineer interview: (1) Online assessment, (2) Technical round 1: networking, coding and design, (3) Technical round 2: backend / frontend depth, (4) System design and past-experience discussion, (5) Senior director / hiring manager round.

Is the Zscaler interview difficult?

Public reports put the Zscaler Software Engineer interview at Medium-Hard difficulty. Reports describe a mix of networking and C fundamentals, medium-to-hard coding problems, and system design, which is a wide range to cover for a product company. The process has 5 rounds, from Online assessment to Senior director / hiring manager round.

Does Zscaler ask DSA?

Yes. Rounds that involve coding: Technical round 1: networking, coding and design. Data structures and algorithms is among the skills reports mention most. Based on 14 public reports, last updated Oct 2026.

How long does Zscaler take to give results?

Time to a result for the Zscaler Software Engineer process, per public reports: About 1-2 weeks for campus hiring; lateral timelines are not clearly reported. The process has 5 rounds, from Online assessment to Senior director / hiring manager round.

What is the Zscaler Software Engineer salary in India?

Estimated from public salary data: Fullstack roles at Zscaler show roughly Rs 11-12 LPA fixed at 1 year of experience and about Rs 34 LPA at 5 years. This is not an official Zscaler figure, and pay varies by level, city and experience.

Sources

Based on 14 public reports: LeetCode Discuss (6), YouTube (4), Glassdoor (3), AmbitionBox (1), last updated Oct 2026.

Compiled by Adarsh Sharma from public candidate reports. Unofficial guide: PortLume AI is not affiliated with Zscaler.

Already interviewed at Zscaler?

Debrief your Zscaler interview free

No signup needed. See what likely went wrong in about 2 minutes.

Last round at Zscaler is usually HR: Zscaler HR interview questions and answers.

Other roles at Zscaler

Software Engineer interviews at similar companies

More: all company interview guides · why candidates get rejected after the interview · rejection email decoder.

PortLume AI

Loading…