Android Xamarin Forms Keyboard Management

I'm seeking a proficient Xamarin Forms developer with a strong background in Android app development. Specifically, the solution should allow an active keyboard to remain open during in-app text editing, even when the send button is hit, mirroring the user experience in common messaging apps such as WhatsApp.

Key project requirements:
- Develop a Xamarin Forms Android application
- Implement unique keyboard behavior - when an editor is selected, and the send button is hit, the keyboard should stay open and maintain focus on the editor.

Desired Expertise:
- Xamarin Forms Development
- Android Application Development
- Clear understanding of mobile UI/UX best practices.

I am looking to have this project delivered promptly. As such, immediate availability and efficient development practices are highly appreciated. Previous experience in chat-based app development would be a bonus.