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 • 

Ashish Pratap Singh

110

4

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 • 

Ashish Pratap Singh

112

4

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 • 

Ashish Pratap Singh

154

3

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 • 

Ashish Pratap Singh

337

18

September 2025

How Indexing Works in Distributed Databases

In a single-node database, indexing is relatively simple.

Sep 28 • 

Ashish Pratap Singh

118

5

Clean Code Tips I Learned from Senior Engineers

Being good at coding and writing good code are two different skills.

Sep 17 • 

Ashish Pratap Singh

145

4

How DNS Actually Works

When you type a website address into your browser, something almost magical happens.

Sep 11 • 

Ashish Pratap Singh

163

10

What are Server-Sent Events (SSE)?

Imagine you’re watching a stock market dashboard. Prices keep changing every second, sometimes multiple times in a second.

Sep 7 • 

Ashish Pratap Singh

62

4

Client-Server Architecture Explained

Every time you're browsing your favorite website, streaming a show, or sending an email, you’re interacting with a system designed around the…

Sep 3 • 

Ashish Pratap Singh

114

August 2025

The 10 BIG Questions of System Design

System design is often misunderstood as a simple exercise of sketching boxes and arrows on a whiteboard.

Aug 31 • 

Ashish Pratap Singh

84

1

From Zero to 30+ Open Source Contributions

A Guide to Jumpstart Your Journey

Aug 26 • 

Ashish Pratap Singh

 and 

Ritankar Saha

77

1

I Created the most Comprehensive LLD Interview Resource

I’m excited to launch my premium Low-Level Design interview resource, which I’ve been working on for the past 4 months.

Aug 21 • 

Ashish Pratap Singh

40

1