WhatsApp API Management Web App

I'm looking for a skilled developer to create a web app for managing the WhatsApp Conversational API. The app should feature a chat UI that closely resembles the original WhatsApp interface, and should include the following functionalities:

Chat UI Features:
- Group chats
- Media sharing (images, videos)
- Read receipts

Agent Assignment:
- First touch and reassignments

Ideal skills and experience:
- Proficiency in web app development
- Experience with WhatsApp API integration
- Strong UI/UX design skills, particularly for chat applications
- Familiarity with real-time data handling and web sockets

Please provide examples of similar projects you've completed.