Local Chatroom App for Android

I'm looking for a developer to create a web and dedicated Android app for a local chatroom platform. The app should allow users to join different chatrooms based on various topics, with no communication between each chatroom. I am open to discussing the technical details with you, as I lack the expertise to specify them precisely.

Key Requirements:
- Ability to create multiple chatrooms with distinct topics
- Guest access for user authentication
- Support for text messages, voice messages, and image sharing within chatrooms
- Exclusively for Android devices

Ideal Skills and Experience:
- Experience in developing Android applications
- Proficiency in web development for creating a seamless chatroom interface
- Strong understanding of chatroom functionalities and user authentication methods
- Ability to implement multimedia sharing features

Please share your ideas and approach in your bid, as your expertise will guide the development process.