Kotlin, Java, RxJava, MVVM, MVP, Swift, Angular, Spring, Hibernate,Okhttp, Retrofit, Butter Knife, Square library/framework for Android, Exo-Player, MVPD, Adobe pass SDK, Truex Ad, Segment Analytics, Chromecast, OAuth, Facebook SDK, SQLite, Android SDK, Dagger2, Google API FCM, JUnit, Mockito, JIRA, REST, JSON, XML, Jenkins, Bit bucket