WhatsApp Business API SaaS & Chatbot Engine

🎯 Project Scope & Objectives

Architect a multi-tenant SaaS platform allowing companies to build automated WhatsApp chatbot workflows, send bulk campaign broadcasts, and manage multi-agent shared inboxes.

🏗 System Architecture & Engineering Breakdown

• API Gateway: Official Meta WhatsApp Cloud API webhooks with HMAC signature verification.
• Shared Inbox: Livewire reactive messaging portal supporting real-time conversation transfer.
• Cache & Storage: Redis pub/sub queue handling high-volume incoming message webhooks.

🔄 End-to-End Workflow Pipeline

1. Message Ingestion: WhatsApp Cloud API sends incoming message payload via webhook.
2. Flow Tree Parsing: Chatbot engine evaluates trigger rules and responds automatically.
3. Agent Handover: Escalate complex inquiries directly to a human agent's shared inbox.

📊 Enterprise Outcomes & Metrics

Handled over 50,000 daily WhatsApp messages with zero message loss and sub-200ms automated bot response times.