N I R A N J A N

@nirxnjxn

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Still learning. Already shipping. Blogging so you don't have to figure it out alone.

Bengaluru, IndiaJoined April 2026

About

Devoloping in web3 and AI

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Freelance working and teaching

N I R A N J A N's blogs

The System Designthesystemdesignupskill.hashnode.dev13 posts

The AWS Logtheawslog.hashnode.dev6 posts

Web 3theweb3log.hashnode.dev4 posts

Agentic Worldtheagenticworld.hashnode.dev3 posts

Technirxnjxn-tech.hashnode.dev2 posts

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Recently published

NIN I R A N J A Ntheagenticworld.hashnode.devJun 29 · 12 min read

RAG Is Not Dead. But a Folder of Markdown Files Just Made It Look Complicated.

One GitHub gist. 16 million views. Then Google turned it into an open standard. Here's what's actually happening to AI memory. Two months ago, Andrej Karpathy — co-founder of OpenAI, former Director

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NIN I R A N J A Nthesystemdesignupskill.hashnode.devJun 22 · 7 min read

How Does Twitter Generate a Unique ID for Every Tweet — Across Hundreds of Servers Simultaneously?

On this page The Problem Nobody Thinks About Approach 1 — UUID (Simple but Flawed) Approach 2 — Central ID Server (Ordered but Fragile) Approach 3 — Snowflake IDs (Twitter's Actual Solution) Brea

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NIN I R A N J A Nthesystemdesignupskill.hashnode.devJun 22 · 7 min read

How Does Netflix Start Playing in 3 Seconds Without Downloading the Entire Movie?

On this page The Question I Never Thought to Ask Reading a Book Page by Page — The Chunking Idea The Same Movie, Five Times Over — Adaptive Bitrate Why Your Video Quality Drops on the Train The D

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NIN I R A N J A Nthesystemdesignupskill.hashnode.devJun 22 · 8 min read

How Does WhatsApp Deliver Messages Instantly — And What Happens When You're Offline?

On this page Two Problems Hiding Inside One Feature The Online Case — WebSockets Again The Offline Case — Persistent Storage The Three Ticks — Tracking Delivery State Group Messages — One Message

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NIN I R A N J A Nthesystemdesignupskill.hashnode.devJun 17 · 8 min read

How Does Google Discover Billions of Pages From Just One URL? Hint : Google crawls

On this page The Question That Started This Every Webpage Is a Node, Every Link Is an Edge BFS vs DFS — Why Breadth Wins The Queue That Needs to Hold Billions of URLs The Infinite Loop Problem B

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N I R A N J A N

About

Available for

N I R A N J A N's blogs

Recently published

RAG Is Not Dead. But a Folder of Markdown Files Just Made It Look Complicated.

How Does Twitter Generate a Unique ID for Every Tweet — Across Hundreds of Servers Simultaneously?

How Does Netflix Start Playing in 3 Seconds Without Downloading the Entire Movie?

How Does WhatsApp Deliver Messages Instantly — And What Happens When You're Offline?

How Does Google Discover Billions of Pages From Just One URL? Hint : Google crawls

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N I R A N J A N

About

Available for

N I R A N J A N's blogs

Recently published

RAG Is Not Dead. But a Folder of Markdown Files Just Made It Look Complicated.

How Does Twitter Generate a Unique ID for Every Tweet — Across Hundreds of Servers Simultaneously?

How Does Netflix Start Playing in 3 Seconds Without Downloading the Entire Movie?

How Does WhatsApp Deliver Messages Instantly — And What Happens When You're Offline?

How Does Google Discover Billions of Pages From Just One URL? Hint : Google crawls