Structure and Frameworks:

Swift + MVC + Realm for iOS.

Android Scanning App

This is for American company. I was one of android developer.

Structure and Frameworks:

Kotlin + RxJava + MVI + Clean Architecture + DAO for Android

These are Android & iOS apps.
MVVM + Dagger2 + RxKotlin
MVVM + RxSwift + SwiftInject + Swift

The app similar to Slack

Offline-online data synchronization.

This is a social app, similar to Tinder.

Structure and Frameworks:

Kotlin + Dagger2 + Fuel + MVP + Realm for Android