Software Security Engineer, Secure Frameworks

Responsibilities

• Build cryptographic frameworks, mTLS infrastructure, secure serialization, authorization systems, and other security foundations.
• Partner with product, research, infrastructure, and security teams to integrate frameworks with lower-layer security controls.
• Design, build, operate, and maintain security services and libraries from threat modeling through production and adoption.
• Build and operate a zero-trust access gateway for Anthropic’s internal services.
• Design and roll out authorization frameworks that enforce least privilege consistently.
• Own cryptographic frameworks and libraries.
• Mentor engineers, contribute to hiring, and help grow the security engineering culture.

Requirements

• At least 8 years of software engineering experience building security-relevant production systems and independently leading complex initiatives.
• Strong programming skills in Go, Rust, or Python.
• Deep understanding of OAuth 2.0, OIDC, JWTs, service-to-service authentication, and policy-based access control.
• Hands-on experience with PKI, X.509, mTLS, and workload identity.
• Working knowledge of applied cryptography, including primitive selection and composition, key management, and library failure modes.
• Experience shipping and operating highly reliable Kubernetes services across cloud and on-premises environments, including on-call support.
• Ability to resolve ambiguous technical problems across teams with clear ownership and communication.
• Strong developer-experience orientation, clear communication across organizational levels, and interest in AI safety.
• Preferred: experience building and driving adoption of organization-wide security frameworks or libraries.
• Preferred: experience with zero-trust or BeyondCorp-style access gateways, identity-aware proxies, large-scale mTLS migrations, open-source cryptographic libraries, and policy-language or relationship-based authorization systems.
• Preferred: familiarity with ML infrastructure, including training and inference serving.
• Bachelor’s degree in a relevant field or an equivalent combination of education, training, and/or experience.

Benefits

• Annual salary range of $32,000—$485,000 USD.
• Visa sponsorship is offered, with reasonable efforts made after an offer and support from an immigration lawyer.
• Hybrid policy requiring staff to work from an office at least 25% of the time, with some roles requiring more office time.
• Competitive benefits, optional equity donation matching, generous vacation and parental leave, flexible working hours, and office collaboration space.