Hello, Sir. Thanks for your job post.
I have checked your proposal in detail and the items is fix for me.
As I am a professional and robust C# Expert, I have created a lot of social comunication project in local company for some companies.
-programming language : C/C++, C#,Swift, Objective C, Java, Kotlin, XML, Json, Php, Html, css
-development environment : Visual Studio2017, Xcode, Android Studio
-DB : CoreData, SQLite, MySQL
-Framework : REST API, Parse Framework, AWS, Firebase, Facebook, Instagram, Twitter, Foursquare, Yelp, Eventbrite, BrainTree, Paypal marketplace.
if you don't mind, we can discuss more detail over chat.
regards!
Yu