Principal Software Engineer (Browser Extension)

Cyberhaven; United States; On-site; USD 120,000 - 180,000; Full time

Job summary

Cyberhaven is seeking an experienced engineer to design, build, and maintain a robust browser extension across Chrome, Edge, and other major browsers using Manifest V3. You will integrate securely with backend services and collaborate with endpoint and backend teams for seamless cross-device functionality.

Applicants should have 5+ years in software engineering, with 3+ years on browser extensions, strong JS/TS and HTML/CSS skills, and a solid understanding of security implications and secure

Qualifications

• 5+ years of software engineering experience, with at least 3 years focused on browser extension development.
• Strong proficiency in JavaScript/TypeScript, HTML/CSS, and modern web technologies.
• Deep understanding of browser extension APIs and security implications.
• Experience with secure coding practices and handling untrusted data.

Responsibilities

• Design, build, and maintain a robust browser extension for Chrome, Edge, and other major browsers using Manifest V3 and modern APIs.
• Implement features that securely interact with web content and backend services, ensuring compliance with security best practices.
• Optimize performance and reliability across diverse environments and user workflows.
• Work closely with the endpoint agent and backend teams to ensure tight integration and consistent functionality across endpoints and services.
• Stay ahead of evolving browser APIs, security standards, and extension ecosystem changes.
• Participate in code reviews, testing, and continuous improvement of development processes.

Skills

JavaScript/TypeScript

HTML/CSS

Web technologies

Communication skills

Tools

Go

Job description

About the Role

Cyberhaven is redefining data security by understanding how data flows across organizations. Our browser extension is a critical component of this vision, enabling visibility and control at the point where users interact with web applications. We’re looking for an experienced engineer to help build and enhance our extension, ensuring it’s secure, performant, and deeply integrated with our platform. You’ll join our Browser Extension team and collaborate closely with both the endpoint agent and backend teams to deliver a seamless experience across devices and environments.

What You’ll Do

• Design, build, and maintain a robust browser extension for Chrome, Edge, and other major browsers using Manifest V3 and modern APIs.




• Implement features that securely interact with web content and backend services, ensuring compliance with security best practices.




• Optimize performance and reliability across diverse environments and user workflows.




• Work closely with the endpoint agent and backend teams to ensure tight integration and consistent functionality across endpoints and services.




• Stay ahead of evolving browser APIs, security standards, and extension ecosystem changes.




• Participate in code reviews, testing, and continuous improvement of development processes.

Who You Are

• 5+ years of software engineering experience, with at least 3 years focused on browser extension development.




• Strong proficiency in JavaScript/TypeScript, HTML/CSS, and modern web technologies.




• Deep understanding of browser extension APIs (Chrome Extensions, Manifest V3, etc.) and security implications of interacting with web content.




• Experience with secure coding practices and handling untrusted data.



• Bonus:
  
  
  

  • Background in security tools, SaaS products, or endpoint technologies.

  
  

  • Knowledge of Go for backend integration.

  
  
  
  



• Excellent communication skills and ability to work cross-functionally with product, design, and backend teams

Joining Cyberhaven is a chance to revolutionize data security. Traditional tools fall short, but we’ve reimagined protection with AI-enabled data lineage that analyzes billions of workflows to understand data, detect risk, and stop threats. Backed by $250M from leading investors like Khosla and Redpoint, our team includes leaders who built industry-defining technologies at CrowdStrike, Palo Alto Networks, Meta, Google, and more. This role lets you shape the future of data security, alongside experts driven to help customers protect their most valuable information.

AI Tools Disclosure: As part of Cyberhaven's hiring process, we use recruiting tools that include AI-powered features to help with tasks like scheduling, note-taking, workflow automation, and other recruiting activities ("AI Tools"). The AI Tools may process information you provide during the application and interview process. When AI-assisted interview note taking is used, candidates are notified in advance and have the option to opt out of the AI-assisted interview note taking.

Cyberhaven is committed to creating a diverse environment and is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.