Browser Security Engineer

@ Perplexity AI

About Perplexity AI

Perplexity is an AI-powered answer engine founded in December 2022 and growing rapidly. With over $1B raised from visionary investors including Jeff Bezos, NVIDIA, Samsung, and more, our mission is to build accurate, trustworthy AI for decision-making.

About the Role

The Browser Security Engineer role at Perplexity AI is focused on leading browser-specific security initiatives within the Comet product. This includes custom Chromium development, ensuring extension security, and supporting secure cross-device features.

Key Responsibilities

• Lead threat modeling and security architecture reviews for all Comet browser surfaces.
• Collaborate with product and engineering teams to identify and mitigate browser vulnerabilities.
• Develop security best practices, tooling, and documentation for browser-facing features.
• Address vulnerabilities found by external researchers and the Chromium community.
• Stay current on emerging browser security threats and industry trends.

What We're Looking For

We seek candidates with prior experience in browser, application, or product security, particularly with Chrome/Chromium or other browser engines. A deep understanding of XSS, CSP, sandboxing, and extension security is essential, along with hands-on experience in security reviews and threat modeling.

Nice to Have

• Contributions to open-source browser projects or bug bounty programs.
• Experience with web and mobile threat modeling.
• Familiarity with secure sync and cross-device communication mechanisms.

Benefits & Compensation

Base salary ranges from $250,000 to $350,000 with potential equity. Comprehensive health, dental, vision, and 401(k) benefits are provided.

Key skills/competency

• Browser Security
• Chromium
• Threat Modeling
• Extension Security
• Vulnerability Resolution
• Security Architecture
• XSS
• Sandboxing
• Custom Engineering
• Secure Sync