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 · Architecture198 articles
Tech blog · India
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
- javascript88 articles
- node.js79 articles
- Engineering70 articles
- devops49 articles
+ 383 more topics in the archive
198 articlesLatest · Oct 2026
Showing 2 articles tagged langchain. Clear filter
Lead article · AI/ML
Building a Harness with Jev: A New Era for AI Decision-Making
· 8 min read 0 views
Explore how Jev, a System One model from TypeSafe AI, revolutionises AI decision-making with faster inference and lower costs.
Read the articleAbout 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 meHiring, or need something built?
Open to senior full-stack and AI engineering roles, and to focused contract work. Delhi NCR or fully remote. I reply within 24 hours.
What I take on
Full-stack product build
React, Next.js, Node, NestJS, MongoDB and MySQL — from idea to production.
AI features that ship
OpenAI and LangChain, RAG, semantic search, content and voice automation.
Architecture and scale
Microservices, real-time pipelines and caching — proven at national news scale.
Founding engineer work
Idea to MVP to scale, with SEO and analytics built in from the start.