Hello, I am a Flutter developer and I am working on mac os system now.
I can generate ipa file using Flutter SDK on Xcode. I have implemented SignIn by Google,Facebook, Instagram with firebase.
Flutter Skills:Backend(Firebase, Laravel, Codeigniter),DataBase(MySql, Sqlite),JSON and serialization,platform channels(platform integration),FlutterFire(third party platform sdk),StatelessWidget,StatefulWidget
I can build your app with high quality and you will be satisfied about my working result.
If you provide me your project and apple developer account, I will publish the app.
I have ability to help you using skill you required and can be realized it anytime.