Snehasish Roy

@snehasishroy

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SDE at PhonePe | Ex {Google, Amazon, Goldman Sachs, Morgan Stanley} | ACM ICPC | IIIT Allahabad

Bengaluru, IndiaJoined August 2023

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Experienced Software developer with 10+ years of experience in Distributed Systems.

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Snehasish Roy's blogs

Distributed Systemssnehasishroy.com19 posts

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Recently published

SRSnehasish Roysnehasishroy.comApr 4 · 7 min read

The String That Should Never Have Existed

Somewhere in a production system, a random string was born. It looked innocent. A transaction ID embedded in a metric name. A session token baked into a log field. A request hash used as an analytics

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SRSnehasish Roysnehasishroy.comMar 21 · 17 min read

Introducing AtomDB - A Strongly Consistent, Embedded KeyValue Database built from scratch

Over the past 1 year, I was working on an itch to build something - not to just vibe code - but to actually understand the primitives and build something useful. I thought, what better way to understa

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SRSnehasish Roysnehasishroy.comJun 8, 2025 · 6 min read

Shuffle Sharding - the secret sauce behing AWS reliability

In a typical client-server architecture, requests from the client are forwarded to a random Application Server by the Application Load Balancer. When the request is a poison pill i.e. it crashes/hungs the server receiving the request, then all of you...

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SRSnehasish Roysnehasishroy.comMay 20, 2025 · 5 min read

Building a Request Coalescer from Scratch

Let’s say you’re building a backend service. Things are going great — until traffic picks up. Suddenly, you notice something odd. You’re seeing multiple identical requests hitting your database or API. They all ask for the same thing and they all mak...

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SRSnehasish Roysnehasishroy.comMay 19, 2025 · 8 min read

Understanding the basics of Kafka Binary Protocol

Apache Kafka is a distributed event streaming platform used for high-performance data pipelines. In this article, we will take a look at the under belly of the Kafka and see how communication happens between the Kafka client and server. Fundamentals ...

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Snehasish Roy

About

Available for

Snehasish Roy's blogs

Recently published

The String That Should Never Have Existed

Introducing AtomDB - A Strongly Consistent, Embedded KeyValue Database built from scratch

Shuffle Sharding - the secret sauce behing AWS reliability

Building a Request Coalescer from Scratch

Understanding the basics of Kafka Binary Protocol

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Snehasish Roy

About

Available for

Snehasish Roy's blogs

Recently published

The String That Should Never Have Existed

Introducing AtomDB - A Strongly Consistent, Embedded KeyValue Database built from scratch

Shuffle Sharding - the secret sauce behing AWS reliability

Building a Request Coalescer from Scratch

Understanding the basics of Kafka Binary Protocol