I need a developer who can deliver a complete, production-ready authentication module that plugs straight into my existing backend. The core requirements are straightforward: • All user data must be stored in a MySQL database you set up and wire to the service. • Users will sign in or register exclusively through social media (OAuth/OIDC) rather than a traditional email-password form. Google and Facebook are the immediate priorities, but your code should be flexible enough to add other providers later. • Every session has to be created, persisted, and destroyed cleanly so users remain logged in across tabs yet can be fully signed out from all devices when they choose. • For added protection, logins must respect an IP whitelisting rule that I maintain in a table or config file. Deliverables - MySQL schema and migration scripts - OAuth/OIDC integration code and callback endpoints - Robust session handling (server-side or JWT, whichever best fits) - Middleware or filters enforcing IP whitelisting before any authenticated route is reached - Clear setup notes so I can deploy the feature in staging and production without guesswork If you have questions about the current tech stack or need test credentials for the social platforms, let me know. I’m ready to start as soon as you can outline your approach and timeline.