I can build your project using Flutter SDK for Android and IOS.
I had already implemented Google, Facebook SignIn by Firebase.
Frontend: flutter(dart)
Backend: Firebase(firestore, realtime database)
API: Node.js
If you provide me detailed requirement and design for app, I will start immediately.
Flutter Skills:Backend(Firebase,CI, Laravel),platform channels(platform integration),Provider,GraphQL(server-side),FlutterFire(third party platform sdk),StatelessWidget,StatefulWidget.