Senior Software Engineer — Identity & Access for Enterprise

StackAI; New York (NY); On-site; USD 202,000 - 230,000; Full time

Job summary

StackAI is hiring a Senior Software Engineer, Identity & Access in New York to build the authentication, authorization, and access control layer for enterprise customers. You will own sign-on, RBAC, provisioning, and delegated identities, shaping how admins manage access at scale.

You will work with Python and modern backend frameworks (FastAPI), focusing on robust, scalable security features that enable large organizations to adopt StackAI confidently.

Qualifications

• 4+ years building backend systems, with significant time spent on identity, authentication, or authorization.
• Deep knowledge of OIDC, OAuth2, SAML, token exchange, and multi-tenant RBAC.
• You've built or owned enterprise SSO and identity systems with enterprise auth patterns.
• Strong in Python and modern backend frameworks (FastAPI or similar).
• Care about clean, well-architected access control and admin experience.

Responsibilities

• Own enterprise sign-on. Deliver SSO across OIDC and SAML for onboarding with identity providers.
• Own authorization and RBAC. Build fine-grained, query-time access control.
• Own provisioning and lifecycle. Deliver SCIM provisioning and directory sync.
• Own delegated and machine identity. Build token exchange and domain-wide delegation.
• Own access governance. Build entitlements, session management, and auditable controls.

Skills

Identity & access control

Backend systems

OIDC/OAuth2

RBAC

Tools

Python

FastAPI

Job description

StackAI is hiring a Senior Software Engineer, Identity & Access in New York to build the authentication, authorization, and access control layer for enterprise customers. You will own sign-on, RBAC, provisioning, and delegated identities, shaping how admins manage access at scale.

You will work with Python and modern backend frameworks (FastAPI), focusing on robust, scalable security features that enable large organizations to adopt StackAI confidently.