Strong knowledge of Android SDK, different versions of Android, and how to deal with different screen sizes.Familiarity with RESTful APIs to connect Android applications to back-end services.Experience with offline storage, threading, and performance tuning.Familiarity with cloud message APIs and push notifications.Proficient understanding of code versioning tools, such as Git.Understanding of Google’s Android design principles and interface guidelines.Strong knowledge in cloud storage likes firebase , google drive.