Principal Software Engineer – Browser Extension

Cyberhaven

Senior Software Engineer developing secure browser extensions integrating with Cyberhaven's data protection tools. Collaborating with cross-functional teams to enhance extension performance and maintain security compliance.

Posted 7/20/2026full-timeRemote • 🇪🇺 Anywhere in EuropeLeadWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in designing and developing browser extensions using JavaScript/TypeScript, HTML/CSS, and Manifest V3, while ensuring security compliance and performance optimization. Collaborates effectively with cross-functional teams to integrate backend services and maintain high-quality coding standards.

Highest-signal resume keywords

Browser Extension DevelopmentJavaScript/TypeScript ProficiencyManifest V3 ExpertiseSecure Coding PracticesPerformance Optimization

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

JavaScriptTypeScriptHTMLCSSBrowser Extension APIsManifest V3Secure CodingPerformance OptimizationBackend IntegrationGo

Tools & Technologies

ChromeEdgeWeb APIsSaaS ProductsSecurity Tools

Industry Keywords

Security Best PracticesWeb Content InteractionEndpoint TechnologiesContinuous ImprovementCode Reviews

Tech Stack

Tools & technologies

GoJavaScriptTypeScript

About the role

Key responsibilities & impact

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.

Requirements

What you’ll need

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.

Benefits

Comp & perks

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.