Staff+ Software Engineer, Auth & Identity at Anthropic

Hybrid - San Francisco, CA

Apply
More jobs at Anthropic

Anthropic’s Auth & Identity team builds the authentication, authorization, and identity platform that underpins every Anthropic product. This role involves owning critical, high‑traffic systems end‑to‑end, designing new credentials, routing access decisions through a unified authorization system, building a first‑class identity model for service accounts and agents, ensuring global distribution and multi‑region failover, and deepening enterprise integration. The team seeks a senior engineer with deep experience in backend platform systems, identity protocols, and security‑adjacent infrastructure, who can shape the technical strategy and lead large migrations in a fast‑moving environment.

Salary

USD 405,000 - 485,000

Requirements

Skills

  • 8+ years of experience building and operating backend or platform systems at scale, ideally including identity, authentication, authorization, or security‑adjacent infrastructure
  • Experience with OAuth 2.0 and OIDC, SAML, SCIM, JWTs and token exchange, workload identity federation, policy engines such as Cedar or OPA, or RBAC and resource‑level access control models
  • Deep understanding of reliability and security, designing for on‑call, failure modes, revocation, and system availability
  • Comfortable owning large migrations in live, high‑traffic systems: shadow modes, incremental rollouts, clean retirement of legacy paths
  • Product‑focused approach to platform work, building primitives that are easy for other engineers to adopt with documentation and self‑service
  • Ability to navigate ambiguity, make independent technical decisions, and communicate clearly with cross‑functional partners and stakeholders
  • Familiarity with using AI tools as part of the software development workflow
  • Experience with globally distributed databases and multi‑region service architecture
  • Experience working in Go, Python, Rust, or TypeScript across a rapidly changing codebase
  • Prior work on enterprise identity integrations with major identity providers and cloud IAM systems
  • Bachelor’s degree or an equivalent combination of education, training, and/or experience

Responsibilities

  • Own critical, high‑traffic systems end‑to‑end, from design through rollout, operations, and iteration
  • Shape the technical strategy for identity and access across Anthropic
  • Design credentials for agents and long‑running autonomous workloads
  • Route every access decision through a unified authorization system with low latency, security guarantees, and multi‑region resilience
  • Build a first‑class identity model for service accounts and agents, linking those identities to other authentication systems
  • Ensure global distribution and multi‑region failover for mission‑critical services
  • Deepen enterprise integration through login policies, recovery methods, self‑service allowlisting, and tighter integrations with providers

Technologies

OAuth 2.0OIDCSAMLSCIMJWTToken exchangeWorkload identity federationPolicy engines (Cedar, OPA)RBACGoPythonRustTypeScriptAI tools

Share job

See if your resume is ready for this job

See how our AI can optimize your resume and improve your chances for this role.