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Staff + Software Security Engineer, Secure Frameworks

Anthropic· Security
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Hybrid (San Francisco, CA), Hybrid (New York City, NY), Hybrid (Seattle, WA)$32k - $485kFull-timePosted 2w ago

About the role

Security-focused engineer responsible for designing, building, and operating security foundations and frameworks used across Anthropic, with emphasis on cryptographic frameworks, mTLS, authorization, and zero-trust infrastructure. Role involves greenfield architecture, cross-team collaboration, on-call production responsibilities, and mentoring.

Responsibilities

  • Build critical security foundations including cryptographic frameworks, mTLS infrastructure, secure serialization, and authorization systems, designed to prevent entire classes of vulnerabilities
  • Partner with product, research, infrastructure, and other security teams to ensure frameworks integrate smoothly with lower-layer security controls
  • Scope, design and build security services and libraries end-to-end, maintain them in production, and drive through ambiguous technical problems with minimal oversight
  • Build and operate the zero-trust access gateway that fronts Anthropic's internal services
  • Design and roll out authorization frameworks so services enforce least privilege consistently instead of each inventing its own access controls
  • Own cryptographic frameworks and libraries
  • Mentor engineers, contribute to hiring, and grow security engineering culture across Anthropic

Qualifications

  • 8+ years of software engineering experience building security-relevant systems in production, including leading complex initiatives independently
  • Strong programming skills in Go, Rust or Python
  • Deep understanding of authentication and authorization systems: OAuth 2.0 / OIDC, JWTs, service-to-service auth, policy-based access control
  • Hands-on experience with PKI, X.509, mTLS and workload identity
  • Working knowledge of applied cryptography: choosing and composing primitives correctly, key management, and the ways libraries fail in practice
  • Experience shipping and operating high-reliability services on Kubernetes across cloud and on-prem environments, including being on call for them
  • A track record of bringing clarity and ownership to ambiguous technical problems and driving them to resolution across teams
  • A strong sense of developer experience
  • Clear communication across all levels of the organization
  • Passion for AI safety and the role security engineering plays in building trustworthy AI systems

Skills

Required:Go, Rust, or PythonOAuth 2.0 / OIDC, JWTs, service-to-service auth, policy-based access controlPKI, X.509, mTLS and workload identityKubernetesCollaborative / cross-team communication

Benefits

  • Competitive compensation and benefits
  • Optional equity donation matching
  • Generous vacation and parental leave
  • Flexible working hours
  • Lovely office space in San Francisco
Last updated Oct 7, 2026. Interested? Apply on the company site.

About Anthropic

building reliable, interpretable, and steerable AI systems

Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.

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