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What are Webhooks?
Imagine you're building an e-commerce platform and using an external payment processor like Stripe to collect payments from users.
 • 
Ashish Pratap Singh
Designing a Scalable “Likes” Counting System for Social Media
At first glance, counting “likes” on a social media post seems simple, just increment a number, right?
 • 
Ashish Pratap Singh
What is Change Data Capture (CDC)?
Modern applications often rely on multiple systems (e.g., search engines, caches, data lakes, microservices), all of which need up-to-date data.
 • 
Ashish Pratap Singh
Designing a Distributed Key-Value Store (Step-by-Step)
A key-value store is a simple type of database where data is stored as {key: value} pairs.
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Ashish Pratap Singh
5
How PostgreSQL Works: Internal Architecture Explained
PostgreSQL has emerged as one of the most powerful and versatile open-source relational databases
 • 
Ashish Pratap Singh
 and 
Alexandre Zajac
9
How to Handle Failures in Distributed Systems
In a distributed system, failures aren’t a possibility—they’re a certainty.
 • 
Ashish Pratap Singh

March 2025

System Design was HARD until I Learned these 30 Concepts
System Design can feel overwhelming especially when you're just starting out and don’t know where to begin.
 • 
Ashish Pratap Singh
13
Top 10 Kafka Use Cases
Apache Kafka began its journey at LinkedIn as an internal tool designed to collect and process massive amounts of log data efficiently.
 • 
Ashish Pratap Singh
Design Instagram - System Design Interview
With over 2 billion monthly active users, Instagram is the 3rd most popular social network after Facebook and YouTube.
 • 
Ashish Pratap Singh
12 Must-Know Data Structures for Coding Interviews
Cracking a coding interview isn’t just about writing code—it’s about solving problems efficiently. And to do that, you need to think in terms of data…
 • 
Ashish Pratap Singh
4
Top 15 Database Scaling Techniques
When your application is small, with just a few hundred users, a single database server is usually enough to handle all the reads, writes, and…
 • 
Ashish Pratap Singh
REST vs GraphQL
Which one should you use?
 • 
Ashish Pratap Singh
2
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