Hybrid

Staff Software Development Engineer (Browser Extension/React)

Full-timePosted 22 Sept

Salary: ₹15–30 LPAEstimated — not stated by the employer.
Experience: 0–3 yearsFreshers welcome
Eligible batches: 2024 · 2025 · 2026
Degree: B.E, B.Tech, M.Tech, B.Sc
Location: Hybrid

About the role

Zscaler is looking for a Staff Software Development Engineer to design, build, and maintain high‑performance browser extensions using React and JavaScript. You will work on security‑focused features that run on every page load, ensuring low latency, minimal memory impact, and a seamless user experience.

Responsibilities

Convert product requirements and UI/UX designs into clean, well‑tested browser‑extension components.
Implement security‑sensitive logic that executes on each page load while keeping latency and memory usage low.
Write modular, readable code and actively contribute to code‑review processes.
Develop comprehensive unit and integration tests and debug complex issues across background scripts, content scripts, pop‑ups, and extension pages.
Collaborate closely with designers, backend engineers, and QA teams to deliver end‑to‑end features.

Free interview prep

Prepare for the interview

All lists

Picked for this role's title and skills: the questions that come up most, each with a short answer to say out loud.

React interview questions40 questions · ≈ 19 min to revise

Asked most often · 17 of 40

Frontend interview questions40 questions · JavaScript, HTML, CSS

Eligibility

Ability to think at scale and align daily work with broader company goals.
Strong curiosity and drive to solve challenging technical problems.
Proactive problem‑solver who thrives on delivering high‑impact solutions.

Skills

ReactJavaScriptBrowser extension developmentUnit and integration testingDebugging across multiple extension contextsWeb security principlesPerformance and memory optimizationCross‑functional collaboration