How Load Balancers Actually Work

A Deep Dive

Jan 8 • Ashish Pratap Singh

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The Hidden Cost of Database Indexes

“Just add an index”. This is the most common advice when a query runs slow.

Jan 6 • Ashish Pratap Singh

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December 2025

I Created the Most Comprehensive System Design Interview Resource

I’m excited to launch my premium pattern-focused System Design interview resource.

Dec 25, 2025 • Ashish Pratap Singh

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How to Use AI Effectively in Large Codebases

AI coding assistants are everywhere now.

Dec 12, 2025 • Ashish Pratap Singh

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Pub-Sub vs Message Queue vs Message Broker

What’s the difference?

Dec 10, 2025 • Ashish Pratap Singh

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Why You Should NEVER Start With Microservices

The hidden cost of premature optimization

Dec 8, 2025 • Ashish Pratap Singh

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November 2025

Linked List: Explained in 4 minutes

Linked List is one of the most fundamental data structures in computer science and a must-know topic for coding interviews.

Nov 16, 2025 • Ashish Pratap Singh

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Latency vs. Throughput vs. Bandwidth

Latency, throughput, and bandwidth are the core metrics that describe the performance of a network or distributed system.

Nov 13, 2025 • Ashish Pratap Singh

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Big-O Notation: Explained in 8 Minutes

Big O Notation is a way to measure how efficiently your code performs as the input size grows.

Nov 4, 2025 • Ashish Pratap Singh

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October 2025

Top 6 API Architecture Styles

An API defines how two systems communicate, what data can be shared, and in what format.

Oct 30, 2025 • Ashish Pratap Singh

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How to Securely Store Passwords in a Database

A password is meant to be secret. If someone steals it, they do not just break into one account, they often get access to every other place where the…

Oct 28, 2025 • Ashish Pratap Singh

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The secret architecture behind "username already taken"

When you try to sign up on a platform like Instagram and type in your username, the system almost instantly tells you whether it’s available or not. If…

Oct 1, 2025 • Ashish Pratap Singh

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