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Senior Web Security Engineer, Browser Platform

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DuckDuckGo

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Location:

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Contract Type:
Not provided

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Salary:

178500.00 USD / Year

Job Description:

Working on the Security Functional Team, you'll play a pivotal role in ensuring our security capabilities keep pace with our rapid product development, directly protecting our users across all our products. You'll also maintain incident detection and response capabilities for the company, and work on general security related projects.

Job Responsibility:

  • 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

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
  • 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

Nice to have:

Any additional experience with our stack is a bonus: Swift/Kotlin/C#/JavaScript (native apps) or JavaScript/Perl/Go (search)

What we offer:
  • Offers Equity
  • Paid parental leave
  • Office setup allowance
  • Co-working allowances

Additional Information:

Job Posted:
January 08, 2026

Employment Type:
Fulltime
Work Type:
Remote work
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