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Anthropic is seeking a Staff+ Software Engineer to own the Auth & Identity platform that underpins every product: the API, Claude Code, Claude.ai, and Enterprise offerings. This is a platform team with a product surface, responsible for authentication, authorization, identity management, and enterprise integration.
You will own critical, high-traffic systems end-to-end, from design through rollout, operations, and iteration. Key responsibilities include:
• Designing credentials for agents and long-running autonomous workloads
• Routing every access decision through a unified authorization system with low latency, security guarantees, and multi-region resilience
• Building a first-class identity model for service accounts and agents
• Global distribution and multi-region failover for mission-critical services
• Deepening enterprise integration: login policies, recovery methods, self-service allowlisting, and tighter integrations with identity providers
You will work closely with product, security, infrastructure, and consuming product teams. You are expected to set technical direction, not just execute. Many problems are 0-to-1 with no established pattern; others involve careful migrations of systems that every Anthropic customer depends on.
Required: 8+ years building and operating backend or platform systems at scale, ideally including identity, authentication, authorization, or security infrastructure. Experience with OAuth 2.0, OIDC, SAML, SCIM, JWTs, token exchange, workload identity federation, policy engines (Cedar/OPA), or RBAC/resource-level access control. Deep care for reliability and security, comfortable owning large migrations in live high-traffic systems. Product-focused approach to platform work, ability to navigate ambiguity independently, and familiarity with AI tools in development workflow.
Strong candidates may have experience with globally distributed databases, multi-region architecture, Go/Python/Rust/TypeScript, and enterprise identity integrations.
