https://gopalkatariya.com/blogs Practical guides on AI engineering, Python backend systems, and shipping products to production. en-us https://gopalkatariya.com/blog/n8n-whatsapp-bot-demo A beginner-friendly demo of building a WhatsApp bot using n8n + WhatsApp Cloud API: webhook, parsing, simple reply logic, and sending responses back to WhatsApp. Tue, 04 Aug 2026 00:00:00 GMT https://gopalkatariya.com/blog/n8n-whatsapp-bot-demo https://gopalkatariya.com/blog/production-rag-chatbots-fastapi A comprehensive guide to scaling retrieval-augmented generation pipelines in production, managing vector indexes, and optimizing response latency. Tue, 28 Jul 2026 00:00:00 GMT https://gopalkatariya.com/blog/production-rag-chatbots-fastapi