WhatsApp API Integration Developer

I'm seeking a skilled developer to integrate the WhatsApp API with WhatsApp and the Meta Business Platform.

Key Functionalities:
- Sending and receiving messages
- Automated replies (personalized based on user data)
- User authentication
- Messaging formats: primarily text messages and documents

Ideal Skills and Experience:
- Proven experience with WhatsApp API
- Proficient in setting up automated replies and user authentication
- Familiarity with text and document messaging formats
- Experience in integrating APIs with various systems, preferably CRM or e-commerce

Please provide examples of similar work done.