Android& IOS cross Based WhatsApp CRM

I'm looking for a skilled developer having android& IOS cross based platform - a WhatsApp CRM. The critical feature to focus on involves message automation which should majorly include predefined replies and the ability to schedule messages. Bidder should show the demo of existing app

Ideal Candidate:
- Strong Android & IOS cross development experience
- Previous experience in CRM systems
- Knowledge of WhatsApp API integration
- Proficiency in automating messaging systems