Senior Identity & Access Engineer - SSO, MFA, RBAC

Scale AI, Inc. in Greater London is seeking a senior engineer to design and build identity infrastructure focused on authentication and authorization across enterprise systems. You will implement SSO, MFA, and federated identity using SAML, OAuth, and OIDC, and apply ReBAC/RBAC and policy-based identity governance.

You will collaborate with product and security teams to drive secure, scalable solutions. Experience with distributed systems and public clouds (AWS) is essential, as is the ability