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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
•
Ashish Pratap Singh
99
11
September 2025
How Indexing Works in Distributed Databases
In a single-node database, indexing is relatively simple.
Sep 28
•
Ashish Pratap Singh
91
3
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
119
4
How DNS Actually Works
When you type a website address into your browser, something almost magical happens.
Sep 11
•
Ashish Pratap Singh
130
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
61
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
106
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
81
1
From Zero to 30+ Open Source Contributions
A Guide to Jumpstart Your Journey
Aug 26
•
Ashish Pratap Singh
and
Ritankar Saha
69
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
July 2025
What is GeoHashing?
Imagine you’re building a system like Uber, Google Maps, or a nearby restaurant finder.
Jul 30
•
Ashish Pratap Singh
119
6
Load Balancer vs Reverse Proxy vs API Gateway
In modern backend architecture, the terms Load Balancer, API Gateway, and Reverse Proxy often come into play.
Jul 18
•
Ashish Pratap Singh
188
7
File Storage vs Object Storage vs Block Storage
When it comes to storing large unstructured data like images, documents, videos, there are three popular storage solutions:
Jul 9
•
Ashish Pratap Singh
129
4
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