Staff Software Security Engineer Secure Frameworks

AI safety and research company building reliable, interpretable, and steerable AI systems, including the Claude product family and developer platform.

Series F+Recently funded0 current maintainers0 active leadsTeam intelligence

Maintainer signals as of 9/25/2026

San Francisco, United States
About Anthropic

Anthropic PBC develops frontier AI systems and deploys them through Claude products and the Claude Platform, with a stated focus on safety, interpretability, and steerability.

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Skills

Candidate Availability

Required and preferred rules are kept separate and reflect the wording in the original posting.

About the Role

You will design, build, operate, and drive adoption of security foundations across the fleet. You will develop cryptographic, identity, authorization, serialization, and zero-trust access systems; partner across functions; maintain production services; and mentor engineers.

Requirements

  • 8+ years of software engineering experience building security-relevant production systems
  • Programming skills in Go, Rust, or Python
  • Knowledge of OAuth 2.0, OIDC, JWT, service-to-service authentication, and policy-based access control
  • Experience with PKI, X.509, mTLS, and workload identity
  • Applied cryptography knowledge, including key management
  • Experience operating high-reliability Kubernetes services across cloud and on-premises environments
  • Experience driving ambiguous technical problems across teams

Responsibilities

  • Build cryptographic frameworks, mTLS infrastructure, secure serialization, and authorization systems
  • Partner with product, research, infrastructure, and security teams on framework integration
  • Scope, design, build, and operate security services and libraries
  • Build and operate a zero-trust access gateway
  • Design and roll out least-privilege authorization frameworks
  • Own cryptographic frameworks and libraries
  • Mentor engineers and contribute to hiring

Benefits

  • Optional equity donation matching
  • Generous vacation
  • Parental leave
  • Flexible working hours