Senior Security Engineer, Proactive Security

Benefits

Parental leave

6 weeks From the posting source checked Jun 20, 2026

Non-birth-parent leave

6 weeks From the posting source checked Jun 20, 2026

Family-building benefits

• Fertility benefits: Offered From the posting source checked Jun 20, 2026
• Adoption assistance: Offered From the posting source checked Jun 20, 2026
• Surrogacy assistance: Not verified

Mental health support

Offered From the posting source checked Jun 20, 2026

Relocation assistance

Not verified

Childcare support

Offered From the posting source checked Jun 20, 2026

Learning budget

Not verified

Verification

Source-linked checked Jun 7, 2026

Salary

$178K-$227K From the posting source checked Jun 20, 2026

401(k) match

Reported from DOL Form 5500 industry filing (not employer-specific)

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Role

Role function

Security From the posting source checked Jun 20, 2026

Seniority

Senior From the posting source checked Jun 20, 2026

Schedule

Shift type

Not verified

Weekend work

Not verified

Company

Company stage

Public-company From the posting source checked Jun 20, 2026

Equity

Offered Verified - SEC 10-K source checked Jun 20, 2026

Application

Cover letter

Not verified

Assessment

Not verified

Deadline

Not stated

Where they hire

State eligibility is not yet verified.

About this role

Senior Security Engineer, Proactive Security Seattle, Washington, USA 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

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