Zscaler

Staff Software Development Engineer (React/Typescript/Browser Extension Development)

Zscaler
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2 months ago
Bengaluru, IndiaStaff+

Responsibilities

  • Build clean, well-tested, performant browser-extension features spanning user-facing UI, security logic, and detection capabilities.
  • Implement security-sensitive logic that runs on page loads while minimizing latency and memory usage and preserving browsing performance.
  • Produce readable, modular, maintainable code and participate in and elevate code reviews.
  • Write unit and integration tests and debug issues across background scripts, content scripts, popups, and extension pages using browser developer tools.
  • Collaborate with UI/UX designers, backend engineers, and QA to deliver features end to end.

Requirements

  • At least 5 years of professional software development experience, including meaningful production frontend development in TypeScript and/or JavaScript.
  • Experience developing browser extensions for Chrome, Firefox, and/or Safari, including extension APIs, MV2/MV3 manifest versions, permission models, content scripts, background/service workers, and extension pages.
  • Strong command of core JavaScript ES6+ and TypeScript types, async/await, closures, modules, and language behavior.
  • Experience with at least one modern frontend framework or reactive UI library such as React, Vue, or Svelte.
  • Proficiency with HTML5 and CSS3 for responsive, component-based user interfaces.
  • Curiosity and active exploration of AI tools, with a history of integrating new technologies into daily workflows and problem-solving.
  • Preferred: experience publishing extensions to a major browser store or supporting multiple browser engines such as Chromium, Gecko, and WebKit.
  • Preferred: familiarity with esbuild, Vite, Rollup, or Webpack and frontend build-pipeline optimization.
  • Preferred: basic understanding of web application security risks and safe coding practices, plus exposure to Node.js for tooling, scripting, or API integration.

Benefits

  • Various health plans
  • Vacation and sick time off plans
  • Parental leave options
  • Retirement options
  • Education reimbursement
  • In-office perks
  • Hybrid working model

Tech Stack

Zscaler

About Zscaler

5,001-10,000 employees

Zscaler builds a cloud-delivered zero trust security platform that replaces traditional network security appliances for enterprises and public-sector organizations. Its Zero Trust Exchange provides secure web gateway, zero trust access, CASB, and cloud firewall services, sold as subscriptions and delivered across 160+ global data centers. Founded in 2007 and headquartered in San Jose, it is a public company on NASDAQ (ZS) serving thousands of customers worldwide.

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