Build a RAG App with LangChain, OpenAI & Node.js — Step by Step
How I built a Retrieval-Augmented Generation system at India Today Group for intelligent article search and content automation using LangChain, OpenAI, and MongoDB Atlas Vector Search.
Tech blogReact · AI · Architecture76 articles
Tech blog · India · page 7
Tech blogs on code, architecture and AI.
Deep dives into React.js, AI and ML integration, MERN stack patterns, and lessons from building production applications at scale in India — written by Deepak Kumar.
What it covers
- javascript34 articles
- Node.js32 articles
- React22 articles
- web development21 articles
+ 178 more topics in the archive
76 articlesLatest · Sept 2026
Archive · page 7
Integrating AI into Next.js Apps: OpenAI, Streaming & Edge Functions
A practical guide to adding AI-powered features to Next.js applications using OpenAI API, Vercel AI SDK, streaming responses, and edge functions for low-latency inference.
MERN Stack Architecture in 2026: What's Changed & Best Practices
How I architect MERN stack applications in 2026 — MongoDB Atlas, Express with TypeScript, React Server Components, Node.js 22, and the tools that replaced Redux.
Engineering India Today's Election Dashboard: Real-Time Data at Scale
Behind the scenes of building India Today's live election results dashboard — handling 10,000+ constituency results in real-time with WebSockets, React, and Node.js.
About the author
Deepak Kumar
Sr Software Engineer at India Today Group | Aaj Tak
Building scalable web applications and Generative AI systems. Writing about React, Node.js, AI and the engineering lessons from 9+ years of production work.
More about me