Magento 2 SSO Integration - OIDC Identity Provider Connection

Overview We need an experienced Magento 2 developer to connect our Magento store to a custom identity provider (IdP) we have already built and tested. All technical documentation, live endpoints, credentials, and staging access will be provided on day one. You will not be building the IdP -just connecting Magento to it. This is a two-phase project with milestone payments. Phase 1 - HMAC Signed URL Login Our platform generates cryptographically signed URLs that allow authenticated users to access our Magento store without a separate login. We need a Magento 2 module that receives these signed URLs, validates them against our existing verification endpoint, and logs the customer in automatically. Estimated effort: 2–4 hours for an experienced developer. Milestone 1 payment upon successful end-to-end test on staging. Phase 2 — Full OIDC SSO (After Phase 1 Complete and tested) We have a fully built OpenID Connect (OIDC) identity provider with all standard endpoints live. We need Magento configured as the service provider, with a custom login path and support for session-level custom attributes passed in the ID token. Estimated effort: 6–10 hours. Milestone 2 payment upon successful end-to-end test on staging and deployment to production. Requirements: -Magento 2.4.x experience required -Prior OIDC or OAuth2 SSO integration experience required -Comfortable working with custom REST API endpoints -Available to start within 3 days Can you provide Examples of Magento SSO, OAuth2, or OIDC integrations you have built? Proposals for: Fixed price for Phase 1 Fixed price for Phase 2 Availability to start Full technical specification provided after selection.