Posted Oct 29, 2026

Senior Web Security Engineer, Browser Platform

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Job Description: • Conduct browser security audits (special pages, DuckAI integrations, password manager, etc.) • Execute on SERP security mitigations (XSS prevention, tooling development to help engineers write safer code) • Manage application security scanning infrastructure setup (aka SAST/DAST integrations in GitHub) • Deliver on Internal red-team operations (simulated attack scenarios) • Support security triage • Work on general security related projects Requirements: • 7+ years of experience in web or application security (performing security assessments, vulnerability research, penetration testing, or secure code review) • Advanced programming or scripting experience with JavaScript. Any additional experience with our stack is a bonus: Swift/Kotlin/C#/JavaScript (native apps) or JavaScript/Perl/Go (search). • Experience with at least one WebView technology (WebKit, WebView2, Chromium WebView, etc.) and understanding of browser security models (SOP, CSP, CORS, SameSite cookies) • Hands-on experience identifying and exploiting web vulnerabilities (XSS, CSRF, injection attacks, authorization flaws, etc.) • Familiarity with security testing tools and frameworks • Experience partnering and collaborating with Product Engineers, advising on security matters and helping teams ship secure code faster • Experience shaping how an organisation thinks about security - driving best practices, improving processes, and raising the bar across teams Benefits: • paid parental leave • office setup • co-working allowances