Being a backend developer and having worked for years in the jungle of authentication and identity management, I can attest to the fact that implementing seamless SSO is often way more complex than it seems. I have witnessed how organizations struggle to integrate diverse applications, balance strict security requirements with user expectations, and maintain system performance across a heterogeneous enterprise environment.
I want to share what I have learned about the design of SSO systems, understand the main protocols like OAuth2 and SAML, address challenges in integration (legacy infrastructures are the most tricky,) and eventually provide an authentication ecosystem that would balance the needs of security mandates with user convenience.
