---
title: "Arpan Sarkar (@arpan7sarkar) | Hashnode"
description: "Developer on the path to becoming an Engineer. Read the latest articles by Arpan Sarkar on Hashnode."
url: "https://hashnode.com/@arpan7sarkar"
---

@arpan7sarkar

# Arpan Sarkar

@arpan7sarkar · Joined June 2025

Developer on the path to becoming an Engineer.

[Website](https://arpansarkar.vercel.app/)

### [ML Engineer vs AI Engineer: What's the Actual Difference?](https://arpansarkar.hashnode.dev/ml-engineer-vs-ai-engineer-what-s-the-actual-difference?utm_source=hashnode&utm_medium=feed)

Not all AI jobs are the same. Learn the real difference between ML Engineers and AI Engineers — and which career path is right for you in 2026.

4 min read · [arpansarkar.hashnode.dev](https://arpansarkar.hashnode.dev/ml-engineer-vs-ai-engineer-what-s-the-actual-difference?utm_source=hashnode&utm_medium=feed)

[Jun 30](https://hashnode.com/posts/ml-engineer-vs-ai-engineer-what-s-the-actual-difference/6a43bcfaf7a10bc28074bc63)

### [How ChatGPT Understands Your Questions?](https://arpansarkar.hashnode.dev/how-chatgpt-understands-your-questions?utm_source=hashnode&utm_medium=feed)

You type. It understands. But how? No magic, no consciousness just math so clever it feels like thinking. Here's what actually happens inside ChatGPT

5 min read · [arpansarkar.hashnode.dev](https://arpansarkar.hashnode.dev/how-chatgpt-understands-your-questions?utm_source=hashnode&utm_medium=feed)

[Jun 30](https://hashnode.com/posts/how-chatgpt-understands-your-questions/6a43a5932af8aa537cae5837)

### [I Shipped the Feature. I Missed the Product.](https://arpansarkar.hashnode.dev/i-shipped-the-feature-i-missed-the-product?utm_source=hashnode&utm_medium=feed)

I completed the task. That was the problem.

7 min read · [arpansarkar.hashnode.dev](https://arpansarkar.hashnode.dev/i-shipped-the-feature-i-missed-the-product?utm_source=hashnode&utm_medium=feed)

[1](https://hashnode.com/posts/i-shipped-the-feature-i-missed-the-product/6a2466b09f6b48efbe9d315f) [Jun 6](https://hashnode.com/posts/i-shipped-the-feature-i-missed-the-product/6a2466b09f6b48efbe9d315f)

### [How Modern Apps Handle Image & Video Uploads ?](https://arpansarkar.hashnode.dev/how-modern-apps-handle-image-video-uploads?utm_source=hashnode&utm_medium=feed)

Learn how modern apps upload images and videos using Multer, memory storage, and cloud services like S3 and Cloudinary.

3 min read · [arpansarkar.hashnode.dev](https://arpansarkar.hashnode.dev/how-modern-apps-handle-image-video-uploads?utm_source=hashnode&utm_medium=feed)

[Feb 21](https://hashnode.com/posts/how-modern-apps-handle-image-video-uploads/69994a8c3dc17c4862125cde)

### [Production-Ready RAG Systems: A Complete Guide to Advanced Patterns and Implementation Strategies](https://arpansarkar.hashnode.dev/production-ready-rag-systems-a-complete-guide-to-advanced-patterns-and-implementation-strategies?utm_source=hashnode&utm_medium=feed)

Production-Ready RAG Systems: A Complete Guide to Advanced Patterns and Implementation Strategies Overview: The Evolution of RAG Architecture Building production-ready Retrieval-Augmented Generation (RAG) systems requires far more than connecting a v...

6 min read · [arpansarkar.hashnode.dev](https://arpansarkar.hashnode.dev/production-ready-rag-systems-a-complete-guide-to-advanced-patterns-and-implementation-strategies?utm_source=hashnode&utm_medium=feed)

[Aug 22, 2025](https://hashnode.com/posts/production-ready-rag-systems-a-complete-guide-to-advanced-patterns-and-implementation-strategies/68a8843a16aeb6a7ad3f5d06)