Medium

Anmol Sehgal

Anmol Sehgal

·

Oct 8, 2025

The Architecture Behind DynamoDB: What Really Happens When You Read and Write Data

When you use DynamoDB, it feels almost magical. You send a PutItem or GetItem request, and data appears or disappears instantly. There are…

The Architecture Behind DynamoDB: What Really Happens When You Read and Write Data

In

CodeX

by

Anmol Sehgal

·

Oct 4, 2025

Master AWS Kinesis in 15 Minutes

Think about this. Every time you watch a cricket match on Hotstar, scroll Instagram Reels, book a ride on Ola, or see live stock price…

Master AWS Kinesis in 15 Minutes

Anmol Sehgal

·

Oct 1, 2025

What Every Software Architect Can Learn from Facebook TAO

When you open Facebook and click to see who liked your post or who are the friends of your friends, the result shows up almost instantly…

What Every Software Architect Can Learn from Facebook TAO

In

CodeX

by

Anmol Sehgal

·

Sep 28, 2025

How Amazon’s Shopping Cart Never Goes Down

Imagine this. You’re shopping on Amazon, you add a phone case to your cart, and suddenly the page crashes. You refresh, and the item is…

How Amazon’s Shopping Cart Never Goes Down

Anmol Sehgal

·

Sep 24, 2025

How a CDN Works: From DNS Lookup to Your Screen

Every time you open Netflix, scroll through Instagram, or shop on Amazon, something remarkable happens behind the scenes. Videos start…

How a CDN Works: From DNS Lookup to Your Screen

In

CodeX

by

Anmol Sehgal

·

Sep 20, 2025

From JSON to Protobuf: Make Your APIs Faster and Lighter

If you have ever worked with APIs or microservices, you probably know how easy it is to send data using JSON. It is human-readable, widely…

From JSON to Protobuf: Make Your APIs Faster and Lighter

In

CodeX

by

Anmol Sehgal

·

Sep 17, 2025

The Hardest Problem in Databases… Solved by Google

When we talk about databases, most people imagine a simple table storing data, queried whenever needed. But at Google’s scale, databases…

The Hardest Problem in Databases… Solved by Google

In

CodeX

by

Anmol Sehgal

·

Sep 13, 2025

The Complete Guide to Java Multithreading: From Zero to Expert — Part IV

Welcome to Part IV of this multithreading journey.

The Complete Guide to Java Multithreading: From Zero to Expert — Part IV

In

CodeX

by

Anmol Sehgal

·

Sep 10, 2025

The Complete Guide to Java Multithreading: From Zero to Expert — Part III

Welcome to Part III of this series on Java multithreading.

The Complete Guide to Java Multithreading: From Zero to Expert — Part III

In

CodeX

by

Anmol Sehgal

·

Sep 6, 2025

The Complete Guide to Java Multithreading: From Zero to Expert — Part II

In Part I of this series, we covered the fundamentals of multithreading — thread lifecycle, synchronization basics, volatile, wait-notify…

The Complete Guide to Java Multithreading: From Zero to Expert — Part II

Anmol Sehgal

Anmol Sehgal

Senior Software Developer @ Amazon | ex Oracle OCI, Goldman Sachs, Expedia | Writing real-world lessons on Java, system design & production-scale architecture.

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