@ayush27p

Ayush Pandit

@ayush27p

Curious about Scalable ,Distributed Systems and AI

Bangalore, IndiaJoined June 2026

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Ayush Pandit's blogs

Ayush-curiosityayush-pandit.hashnode.dev6 posts

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APAyush Panditayush-pandit.hashnode.dev6d ago · 14 min read

Replication Is Expensive. Here's How S3 Gets the Same Durability for Half the Cost

A deep dive from first principles to Reed-Solomon math to production architecture Why this matters If you've ever wondered how S3 promises 99.999999999% durability (eleven nines lose 1 object out of

APAyush Panditayush-pandit.hashnode.devJun 28 · 16 min read

How Google Lens Works: From Uploaded Image to Search Results

1. Introduction: why reverse image search is a hard engineering problem Here's the trap juniors fall into with this topic: they assume the hard part is "the AI." It isn't. The model that turns an imag

APAyush Panditayush-pandit.hashnode.devJun 28 · 9 min read

MongoDB Change Streams Internals From Database Writes to Real Time Systems

If you ask ten backend engineers how MongoDB Change Streams work, most will answer something like: "You call watch() and MongoDB notifies you whenever a document changes." That answer is technically

APAyush Panditayush-pandit.hashnode.devJun 22 · 6 min read

Kafka Core Concepts

When most developers first learn Kafka, they are introduced to a bunch of terms like Producer , Consumer, Partition, Offset, Topics etc. The problem is that none of these explain why Kafka exists. It'

APAyush Panditayush-pandit.hashnode.devJun 17 · 10 min read

The Most Underrated Background Job System in Node.js

Most engineers learn Kafka before they actually need Kafka. That sentence sounds backwards, but it's the pattern I keep seeing. Teams reach for Kafka to solve problems that a database table and a work

Ayush Pandit

About

Available for

Ayush Pandit's blogs

Recently published

Replication Is Expensive. Here's How S3 Gets the Same Durability for Half the Cost

How Google Lens Works: From Uploaded Image to Search Results

MongoDB Change Streams Internals From Database Writes to Real Time Systems

Kafka Core Concepts

The Most Underrated Background Job System in Node.js

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Ayush Pandit

About

Available for

Ayush Pandit's blogs

Recently published

Replication Is Expensive. Here's How S3 Gets the Same Durability for Half the Cost

How Google Lens Works: From Uploaded Image to Search Results

MongoDB Change Streams Internals From Database Writes to Real Time Systems

Kafka Core Concepts

The Most Underrated Background Job System in Node.js