Chief Browser Defender

Browser Security Researcher

At SquareX, we are committed to securing the internet for everyone.

We are seeking a Browser Security Researcher to lead investigations into browser security threats and client-side attack vectors. The successful candidate will focus on identifying emerging threats, creating proof-of-concept exploits, and contributing research insights that strengthen our browser security posture.

• Conduct research in browser-focused security threats, including vulnerabilities, bugs, and advanced attack vectors targeting enterprise users.
• Build, test, and deploy POCs to simulate real-world threats and highlight impact of discovered issues.
• Create technical video demonstrations of attacks and solutions.
• Draft high-quality technical write-ups, whitepapers, or research submissions for security conferences and publications.
• Track and monitor the evolving threat landscape relevant to browser security and propose mitigation strategies.
• Collaborate with internal teams (including engineering, product, and marketing) to align research outcomes with company goals and public outreach.

The ideal candidate should have 5+ years of experience in cybersecurity research, with a strong focus on browser, extensions, or client-side browser/user security.

• Must have proficiency in Python for automation, scripting, and tooling.
• Must have good understanding of JavaScript and modern web technologies; adaptability to new frameworks and browser environments.
• Should have familiarity with Linux VM/Container environments and cloud platforms.

Familiarity with publishing or contributing to technical research papers, CVEs, or security community knowledge bases is a plus.