Circle GmbH

Joined in 2024
66% answers
  • Circle GmbH

    Senior/Middle Frontend Developer (Browser Extensions)

    Full Remote · Germany, Ukraine, Czechia · Product · 3 years of experience · Beginner/Elementary
    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...

    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.
Log In or Sign Up to see all posted jobs