Senior Security Engineer, Proactive Security

The Senior Security Engineer is a senior individual contributor responsible for independently driving security initiatives across multiple services and teams. This role requires deep technical expertise in application security, threat modeling, and secure system design, combined with the ability to influence engineering teams and deliver high-impact security outcomes with minimal guidance.

Key job responsibilities Security Reviews & Assessments: Lead end-to-end security reviews for complex, high-priority services including design reviews, threat modeling, and penetration testing scoping and readout Technical Leadership: Serve as a subject matter expert for assigned affinity teams, providing architectural guidance and security consultation to service teams throughout the development lifecycle Threat Modeling: Independently perform and guide threat modeling exercises for complex distributed systems, identifying risks and recommending mitigations Manual Code Review: Conduct targeted manual code reviews of security-critical components, identifying vulnerabilities and insecure patterns that automated tools miss Penetration Testing: Scope, coordinate, and oversee penetration testing engagements; analyze results and drive remediation with service teams Findings Management: Identify, document, and track security findings to resolution; escalate critical issues to leadership when appropriate Mentorship & Influence: Mentor junior engineers, contribute to team processes and tooling improvements, and raise the security bar across the organization Design & Build Security Tooling: Design and build security automation, tooling, and processes that improve operational efficiency and scale the team's impact AI-Powered Security Automation: Leverage generative AI and machine learning to build intelligent security automations that streamline review workflows, enhance vulnerability detection, and reduce manual toil Builder Engagement: Partner with service teams to improve security posture proactively, including developing self-service guidance, documentation, and readiness frameworks Metrics & Reporting: Define and track security metrics that measure risk reduction, operational efficiency, and builder experience improvements

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