Originally published at parvejshah.com/blog/conversational-commerce-webhook-architecture by Parvej Shah.
In Bangladesh and much of South and Southeast Asia, e-commerce doesn't look like what a Silicon Valley product manager pictures. Buyers don't browse product catalogs, add items to carts, and check out with saved payment methods. They send a message on Facebook or WhatsApp, ask if an item is in stock, negotiate slightly, confirm their address, and pay by mobile banking transfer. The entire purchase funnel is a conversation.
SellerVai is a platform built for exactly this reality: a 24/7 automated sales assistant that handles order inquiries, processes orders in Bengali and Banglish, and filters fake Cash-on-Delivery (COD) requests across WhatsApp Business API, Facebook Messenger, and Telegram.
The core engineering challenge wasn't the AI. It was the plumbing.
Why Webhooks Are Harder Than They Look
