Android developer needed to help add chat and video sharing features to existing native app

we are looking for one or more android native developer to help us add new chat and video sharing features to our existing application. the developers are needed for both a short term or long term. long term being our preference. the current application is using java/kotlin, MVVM, retrofit, Exoplayer, and other popular libraries.

We are looking for intermediate or expert level. work can be remote about GMT +/- 4hours