Senior/Middle Frontend Developer (Browser Extensions) Offline

Responsibilities
 

• Develop and maintain browser extensions (Chrome, Firefox).
• Work with Manifest V2/V3 and ensure compatibility with different browsers.
• Integrate extensions with backend APIs and manage data flow efficiently.
• Optimize performance and troubleshoot issues related to browser security policies (CORS, Content Security Policy).
• Stay up to date with browser API changes and best practices.

Requirements
 

• 3+ years of experience in frontend development.
• Strong JavaScript/TypeScript skills.
• Experience with HTML5, CSS3, and modern UI frameworks (React, Vue.js, or Svelte).
• Proficiency in working with WebExtensions API, Chrome Extensions API.
• Knowledge of background scripts, content scripts, service workers.
• Understanding of asynchronous programming, Promises, WebSockets.
• Familiarity with Webpack, Vite, or other build tools.
• Ability to write clean, modular, and maintainable code.
• Experience working with RESTful APIs.

Nice to Have
 

• Knowledge of automated testing for extensions.
• Experience with script injection.