WhatsApp Business API + CRM Integration

I need to build a WhatsApp Business API integrated with a CRM system. The primary use of this setup will be for messaging automation, specifically for sending promotional messages.

Key Requirements:
- Messaging Automation: Primarily focused on sending promotional messages.
- CRM Integration: The CRM should include features for:
- Customer Segmentation
- Lead Tracking
- Bulk Messaging
- Automation

Ideal Skills and Experience:
- Experience with WhatsApp Business API
- Strong knowledge of CRM systems and integration
- Proficiency in messaging automation setups
- Background in customer segmentation and lead tracking

Please provide examples of similar work and your approach to this project.