Technical Lead

Highly skilled and experienced Senior Developer with in-depth expertise in building and maintaining browser extensions, advanced JavaScript programming, and web automation. The ideal candidate should have strong problem-solving abilities, be comfortable working with complex browser APIs, and possess a deep understanding of modern web architecture and security contexts like CORS and shadow DOM.

Key Responsibilities:

• Design, develop, and maintain browser extensions for Chrome, Firefox, and other major browsers using their respective extension APIs.
• Work extensively with Chrome Extension Manifest V3, background/service workers, content scripts, message passing, and permission models.
• Write clean, efficient, and modular JavaScript code from vanilla JS to advanced OOP patterns and Promises.
• Handle complex async workflows, fetch APIs, and interactions across cross-origin iframes securely.
• Leverage the Shadow DOM for creating encapsulated UI components and handle styling/scripting challenges.
• Implement and maintain web automation logic using native DOM APIs and event simulations.
• Drive architectural decisions, evaluate technical trade-offs, and provide innovative solutions.

Required Skills & Qualifications:

• Browser Extension Expertise:
  • Strong experience with Chrome Extensions APIs (Manifest V3), Firefox WebExtension APIs
  • Deep understanding of extension architecture: background scripts, content scripts, messaging, permissions, etc.
  • Knowledge of Chrome debugging tools, devtools integration, and browser internals.
• JavaScript:
  • Expert-level knowledge in vanilla JavaScript including ES6+, dynamic imports
  • Strong grasp of OOP in JS, prototypes, and closures
  • Mastery of Promises, async/await, and event loops
• Web APIs and Architecture:
  • Proficiency in DOM traversal, manipulation, and event handling
  • Experience working with fetch, XHR, and real-time APIs
  • Understanding of CORS, Cross-Origin Frame Messaging, and Web Security
• Advanced Web Features:
  • Hands-on with Shadow DOM, Web Components, and encapsulated styles
  • Familiarity with OAuth, SSO integration, and token-based auth workflows
• Automation & Scripting:
  • Strong skills in web automation, synthetic events, and page interaction scripting
  • Experience with tools like Puppeteer, Playwright, or custom DOM-based automation logic (a plus)
• Nice to Have:
  • Experience with TypeScript
  • Familiarity with CI/CD pipelines and automated testing for extensions
  • Contributions to open-source extension projects or plugins
  • Experience working in Agile teams

Contact Person: Sarita Rathi

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