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Keeper Security, Inc. Logo

Senior Software Engineer, Browser Ext

Keeper Security, Inc.

Salary not specified
Aug 29, 2025
El Dorado Hills, CA, US
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Keeper Security is looking to hire talented JavaScript / ReactJS developers to join the Browser Extension team to develop and enhance browser extension features that empower millions of users to secure their digital lives.

Requirements

  • 5+ years of experience in JavaScript development, including proficiency in core JavaScript concepts.
  • 3+ years of experience with React, Redux, Jest, and TypeScript.
  • Strong experience with browser extension development and the unique challenges it presents (e.g., compatibility across different browsers, browser APIs).
  • Experience with modern web development tools and workflows, including build tools like Webpack, version control using Git, and CI/CD pipelines.
  • Solid understanding of frontend architectures, including component-based development, state management, and UI/UX principles.
  • Experience with testing frameworks such as Jest and writing comprehensive unit and integration tests.
  • Ability to maintain and improve a large codebase, ensuring it remains stable, scalable, and maintainable.

Responsibilities

  • Design, build, and maintain high-quality, scalable, and secure features for the Keeper Browser Extension using JavaScript, React, Redux, and Jest.
  • Work closely with product managers, UX/UI designers, and other engineers to define requirements and deliver the best possible user experience.
  • Ensure the highest standards for coding practices, including test-driven development (TDD), writing unit tests with Jest, and participating in code reviews.
  • Continuously analyze, improve, and optimize the performance, reliability, and security of the browser extension to meet the growing needs of users.
  • Review, maintain, and improve the current codebase, fixing bugs, implementing new features, and refactoring code as necessary to keep it scalable and maintainable.
  • Actively engage in code reviews to ensure quality, share knowledge with team members, and uphold coding standards.
  • Keep up to date with the latest trends, best practices, and tools in web development, browser extensions, and cybersecurity.

Other

  • 100% remote position!
  • Excellent communication skills, with the ability to collaborate effectively with remote teams.
  • Bachelor’s degree in Computer Science, Engineering, or a related technical discipline, or equivalent practical experience.
  • Experience working with security technologies and understanding of cybersecurity principles, particularly with regard to browser security and data protection.
  • Experience with performance optimization for browser extensions, focusing on load times, memory management, and responsiveness.