Browser Security Engineer at Perplexity AI

San Francisco, California, United States

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Not SpecifiedCompensation

Senior (5 to 8 years), Expert & Leadership (9+ years)Experience Level

Full TimeJob Type

UnknownVisa

Technology, AI, Browser SecurityIndustries

Requirements

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

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

Skills

Key technologies and capabilities for this role

ChromiumBrowser SecurityXSSSame-Origin PolicyCSPSandboxingBrowser ExtensionsThreat ModelingSecurity ArchitectureCustom ChromiumWebViewBug Bounty

Questions & Answers

Common questions about this position

What is the salary range for the Browser Security Engineer role?

The cash compensation range for this role is $250,000 - $350,000, with final offer amounts determined by factors including experience and expertise.

Is this a remote position or does it require office work?

This information is not specified in the job description.

What key skills are required for this Browser Security Engineer position?

Prior experience in browser, application, or product security (ideally with Chrome/Chromium), deep knowledge of modern browser architectures including XSS, CSP, sandboxing, and extension security, and experience with security reviews and threat modeling for web, mobile, and extension platforms are required.

What is the company culture like for this role at Perplexity AI?

The environment prioritizes security and product excellence, with close collaboration among top engineers, product teams, and external security researchers in a proactive, embedded security approach.

What makes a strong candidate for the Browser Security Engineer role?

Strong candidates have prior browser security experience ideally with Chrome/Chromium, deep knowledge of browser threats like XSS and sandboxing, threat modeling expertise, cross-functional collaboration skills, plus nice-to-haves like open-source contributions, bug bounty participation, and proactive security work in product teams.

Perplexity AI

Advanced answer engine providing reliable information

About Perplexity AI

Perplexity AI provides an advanced answer engine that delivers accurate and reliable responses to user queries. The platform uses current sources to ensure the information is both precise and relevant. It caters to a wide audience, including individuals looking for quick answers and businesses needing detailed information. Unlike many competitors, Perplexity AI emphasizes high-quality, source-backed answers, making it a valuable resource for users seeking trustworthy data. The company's goal is to meet the increasing demand for immediate access to reliable information, generating revenue through subscription fees, advertising, and partnerships.

San Francisco, CaliforniaHeadquarters

2022Year Founded

$890MTotal Funding

LATE_VCCompany Stage

Data & Analytics, Consumer SoftwareIndustries

201-500Employees

Benefits

Health Insurance

Dental Insurance

Vision Insurance

401(k) Retirement Plan

Company Equity

Risks

Pending copyright infringement class action poses legal and financial challenges.

Competition from Google's AI Mode could impact user retention and market share.

Otterly.AI's brand visibility tool may pressure Perplexity to maintain high performance.

Differentiation

Perplexity AI integrates large language models with search engines for precise responses.

The platform offers an open-source environment, enhancing public access to AI tools.

Perplexity's strategic acquisition of Carbon boosts its data connectivity capabilities.

Upsides

Partnership with Tripadvisor enhances travel planning with personalized recommendations.

$500M funding round increases valuation to $9 billion, supporting growth and innovation.

Integration with FactSet attracts financial clients with enhanced data accessibility.

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