SSO Framework Development & Spring Boot Integration

Build SSO Framework and Integrate with Existing Spring Boot Application

We are looking for an experienced developer to build a Single Sign-On (SSO) framework and integrate it with an existing Spring Boot application.

The SSO solution should primarily support Microsoft Azure / Entra ID, along with other leading Identity Providers (IdPs).

Requirements:

* Strong experience implementing SSO solutions
* Hands-on experience with Spring Boot and Java
* Experience integrating with Microsoft Azure / Entra ID
* Experience with other leading Identity Providers such as Okta, Auth0, Google, etc.
* Understanding of OAuth 2.0, OpenID Connect (OIDC), SAML, and related authentication standards
* Ability to integrate the solution cleanly into an existing Spring Boot codebase

Important:
We are specifically looking for someone who has already implemented similar SSO solutions in production. If you have relevant hands-on experience, please respond with:

1. A brief description of similar SSO projects you have implemented
2. Identity Providers you have worked with
3. Technologies/frameworks used
4. Any relevant project references or examples, if available

Please respond only if you have direct, hands-on experience implementing SSO, preferably with Spring Boot and Azure/Entra ID.

Share your effort estimation and what it would cost me along with your response. I would be happy to answer any questions that you might have.