Java, Algorithms, Performance Tuning, Push Notifications, Kotlin, Android development, Git, Version Control Systems, Android SDK, data structures, Restful Apis, offline storage, open-source Android libraries, object-oriented design, cloud messaging APIs, Threading, Android UI design principles

Volley, Data Binding, Kotlin, Git, Retrofit, Xml, Glide, SharedPreferences, MVVM architecture, View Binding, Navigation Component, Ktor, Coil, DataStore, Room, RecyclerView

Git, React, Typescript, Javascript, Datastructures, Node.js, React Native, Restful Apis, Python, SDKs

Git, Android SDK, Kotlin, Restful Apis, third-party libraries