Staff+ Software Engineer, Auth & Identity

Anthropics mission is to create reliable interpretable and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers engineers policy experts and business leaders working together to build beneficial AI systems.

The Auth & Identity team builds the authentication authorization and identity platform that underpins every Anthropic product: the API Claude Code and our Enterprise offerings. Every login API key OAuth token access decision and organization record flows through the systems we own. As Claude moves from a chat product to an agentic platform we are defining what identity and access look like when the actor is a human a service account or an autonomous agent acting on someones behalf.

We are a platform team with a product surface. The horizontal is the set of services every product consumes: credential minting and exchange authorization controls and the canonical record of users service accounts agents and the organizations they belong to. The vertical is the experience where admins author that policy: SSO and SCIM setup roles and permissions IP allowlisting and API key policies.

Our work falls into four pillars:

1. Authentication Who you are. Credential minting exchange and lifecycle; sessions; workload identity federation; auth for async and agentic workloads.
2. Authorization What you can do. The policy framework for model membership role and resource access.
3. Identity Who belongs to what. The tenant and organization model and first-class identity for humans service accounts and agents portable across surfaces and cloud environments.
4. Enterprise How enterprises connect. SSO SCIM login policies and the admin controls that let customers provision and govern users from their own identity provider.

You will own critical high-traffic systems end to end from design through rollout operations and iteration and help shape the technical strategy for how identity and access work across Anthropic. Representative problems we are working on right now:

• 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 and linking those identities to other identity and auth systems.
• Global distribution and multi-region failover for some of the companys most mission-critical services.
• Deepening enterprise integration: login policies and recovery methods self-service allowlisting and tighter integrations with providers.

You will work closely with product security infrastructure and the product teams that consume our primitives and you will be expected to set technical direction not just execute on it. Many of the problems are 0-to-1 with no established pattern to copy; others are careful migrations of systems that every Anthropic customer depends on in the hot path.

• Have 8 years of experience building and operating backend or platform systems at scale ideally including identity authentication authorization or security-adjacent infrastructure.
• Have worked with some of: 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.
• Care deeply about reliability and security. You design for on-call failure modes revocation and the engineer who inherits your system and you treat availability of auth as table stakes for every product built on it.
• Are comfortable owning large migrations in live high-traffic systems: shadow modes incremental rollouts and clean retirement of legacy paths.
• Take a product-focused approach to platform work and build primitives that are easy for other engineers to adopt correctly with documentation and self-service as part of the deliverable.
• Can navigate ambiguity and make sound technical decisions independently and communicate clearly with cross-functional partners and stakeholders.
• Are familiar with using AI tools as part of your 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.

Deadline to apply:None. Applications will be reviewed on a rolling basis.

Location Preference: Preference will be given to candidates based in NY SEA SF or the Bay Area given the current location of team.

Minimum education: Bachelors degree or an equivalent combination of education training and/or experience

Required field of study:A field relevant to the role as demonstrated through coursework training or professional experience

Minimum years of experience: Years of experience required will correlate with the internal job level requirements for the position

Location-based hybrid policy: Currently we expect all staff to be in one of our offices at least 25% of the time. However some roles may require more time in our offices.

Visa sponsorship:We do sponsor visas! However we arent able to successfully sponsor visas for every role and every candidate. But if we make you an offer we will make every reasonable effort to get you a visa and we retain an immigration lawyer to help with this.

We encourage you to apply even if you do not believe you meet every single qualification. Not all strong candidates will meet every single qualification as listed. Research shows that people who identify as being from underrepresented groups are more prone to experiencing imposter syndrome and doubting the strength of their candidacy so we urge you not to exclude yourself prematurely and to submit an application if youre interested in this work. We think AI systems like the ones were building have enormous social and ethical implications. We think this makes representation even more important and we strive to include a range of diverse perspectives on our team.

Your safety matters to us. To protect yourself from potential scams remember that Anthropic recruiters only contact you some cases we may partner with vetted recruiting agencies who will identify themselves as working on behalf of Anthropic. Be cautious of emails from other domains. Legitimate Anthropic recruiters will never ask for money fees or banking information before your first day. If youre ever unsure about a communication dont click any linksvisit for confirmed position openings.

We believe that the highest-impact AI research will be big science. At Anthropic we work as a single cohesive team on just a few large-scale research efforts. And we value impact advancing our long-term goals of steerable trustworthy AI rather than work on smaller and more specific puzzles. We view AI research as an empirical science which has as much in common with physics and biology as with traditional efforts in computer science. Were an extremely collaborative group and we host frequent research discussions to ensure that we are pursuing the highest-impact work at any given time. As such we greatly value communication skills.

The easiest way to understand our research directions is to read our recent research. This research continues many of the directions our team worked on prior to Anthropic including: GPT-3 Circuit-Based Interpretability Multimodal Neurons Scaling Laws AI & Compute Concrete Problems in AI Safety and Learning from Human Preferences.

Anthropic is a public benefit corporation headquartered in San Francisco. We offer competitive compensation and benefits optional equity donation matching generous vacation and parental leave flexible working hours and a lovely office space in which to collaborate with colleagues. Guidance on Candidates AI Usage:Learn aboutour policy for using AI in our application process.