WhatsApp API Bulk Messaging

I want to move my promotional outreach from manual blasts to a fully automated WhatsApp drip campaign that keeps my customers engaged. The core of the job is to build and deploy a bulk-sender powered by the official WhatsApp Business API... (Budget: ₹1500 - ₹12500 INR, Jobs: API, API Development, Automation, Linux, Node.js, PHP, Python, Software Architecture, Twilio, Web Development)