---
title: "Harsh Prajapati (@iamharsh) | Hashnode"
description: "Software Developer at Dentsu | Full Stack Developer | MERN | Next.js | AWS. Read the latest articles by Harsh Prajapati on Hashnode."
url: "https://hashnode.com/@iamharsh"
---

@iamharsh

# Harsh Prajapati

@iamharsh · Joined June 2026

Software Developer at Dentsu | Full Stack Developer | MERN | Next.js | AWS

[Website](https://www.iamharsh.in/)

### [Where RAG Fails: Understanding the Limitations](https://harsh-prajapati.hashnode.dev/where-rag-fails?utm_source=hashnode&utm_medium=feed)

RAG makes LLMs smarter, but it isn't magic. Here's where it breaks

11 min read · [harsh-prajapati.hashnode.dev](https://harsh-prajapati.hashnode.dev/where-rag-fails?utm_source=hashnode&utm_medium=feed)

[1](https://hashnode.com/posts/where-rag-fails/6a5d086278ee7d04af52894b) [Jul 19](https://hashnode.com/posts/where-rag-fails/6a5d086278ee7d04af52894b)

### [How LLMs Actually Work: An Architecture Walkthrough for Developers](https://harsh-prajapati.hashnode.dev/from-prompt-to-response-how-llms-work?utm_source=hashnode&utm_medium=feed)

Understand how LLMs process language using tokenization, embeddings, transformers, and attention in this developer-friendly guide.

5 min read · [harsh-prajapati.hashnode.dev](https://harsh-prajapati.hashnode.dev/from-prompt-to-response-how-llms-work?utm_source=hashnode&utm_medium=feed)

[Jul 1](https://hashnode.com/posts/from-prompt-to-response-how-llms-work/6a44ffad8998339598066f8a)