N I R A N J A N (@nirxnjxn)

The Frequency Array Pattern: 3 LeetCode Problems, 1 Idea, and the Mistake I Made Twice

Valid Anagram, Group Anagrams, Top K Frequent Elements. Same core trick every time. I still got called out for the same bug twice in a row. Starting my SDE interview prep properly now — trees, graphs

Jul 27 · 7 min readtheawslog.hashnode.dev

Loop Engineering: The Skill That Matters More Than Prompting in 2026

A few weeks ago I wrote about harness engineering — how Anton, my local Rust coding agent, needed an outer shell to manage state and context instead of just appending every message to a growing vector

Jul 14 · 12 min readtheagenticworld.hashnode.dev

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

Jun 29 · 12 min readtheagenticworld.hashnode.dev

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

Jun 22 · 7 min readthesystemdesignupskill.hashnode.dev

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

Jun 22 · 7 min readthesystemdesignupskill.hashnode.dev

N I R A N J A N

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N I R A N J A N's blogs

The Frequency Array Pattern: 3 LeetCode Problems, 1 Idea, and the Mistake I Made Twice

Loop Engineering: The Skill That Matters More Than Prompting in 2026

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?

N I R A N J A N

About

Available for

N I R A N J A N's blogs

The Frequency Array Pattern: 3 LeetCode Problems, 1 Idea, and the Mistake I Made Twice

Loop Engineering: The Skill That Matters More Than Prompting in 2026

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?

N I R A N J A N

About

Available for

N I R A N J A N's blogs

The Frequency Array Pattern: 3 LeetCode Problems, 1 Idea, and the Mistake I Made Twice

Loop Engineering: The Skill That Matters More Than Prompting in 2026

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?

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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

The Frequency Array Pattern: 3 LeetCode Problems, 1 Idea, and the Mistake I Made Twice

Loop Engineering: The Skill That Matters More Than Prompting in 2026

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?