Perplexity · 2 days ago
Browser Security Engineer
San Francisco, CA
Full-time
Onsite
Senior Level
$210K/yr - $385K/yrPerplexity is seeking a Browser Security Engineer to lead browser-specific security initiatives for their Comet product. The role involves collaborating with engineering teams to identify and mitigate vulnerabilities, develop security best practices, and stay updated on emerging threats.
Artificial Intelligence (AI)ChatbotMachine LearningNatural Language ProcessingSearch Engine
Responsibilities
Lead threat modeling and security architecture reviews for all Comet browser surfaces
Collaborate closely with product and engineering teams to proactively identify and mitigate browser vulnerabilities, especially issues specific to custom Chrome engineering and browser extension architecture
Develop security best practices, tooling, and documentation for engineers building browser-facing features
Serve as the security expert for topics such as Same-Origin Policy (SOP), XSS, sandboxing, browser extension permissions, and secure inter-device communication
Triage and resolve vulnerabilities found by external researchers (e.g., bug bounty, red-teaming partners) and the Chromium community
Build strong relationships with security partners and leverage their feedback for continuous improvement
Stay up to date on emerging browser security threats, tools, and industry trends
Qualification
Required
Prior experience in browser, application, or product security (ideally with Chrome/Chromium or other browser engine experience)
Deep knowledge of modern browser architectures; understanding of XSS, CSP, sandboxing, extension security, and WebView-specific threats
Experience with security reviews and threat modeling for web, mobile, and extension platforms
Ability to work cross-functionally with engineers, product leads, and external security researchers
Preferred
Contributions to open-source browser projects, security research, or participation in bug bounty programs
Experience with web and mobile threat modeling
Familiarity with secure sync and cross-device communication mechanisms
Track record of proactive security work embedded within product teams
Company
Perplexity
Perplexity is an AI-powered answer engine designed to provide accurate, real-time responses to user queries.
Founded in 2022
201-500 employees
H1B Sponsorship
Perplexity has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (12)
2024 (7)
2023 (2)
Funding
Current Stage
Late StageTotal Funding
$1.48BKey Investors
Cristiano RonaldoNuVenturesAccel
2025-12-05Undisclosed
2025-09-10Series Unknown· $200M
2025-08-15Secondary Market
Leadership Team
Aravind Srinivas
Cofounder, President, CEO
Denis Yarats
Co-Founder & CTO
Recent News
2026-01-17
2026-01-17
Company data provided by crunchbase