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@yashveer

Yashveer Singh

@yashveer

Backend developer skilled in Node.js, Express.js, MongoDB, and Redis. Expert in building scalable systems, API integrations.

IndiaJoined January 2025

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Yashveer Singh's blogs

SCALE FROM ZERO TO MILLIONS OF USERSsystemdesignsfztmu.hashnode.dev1 post

Back-of-the-Envelope Estimationbackoftheenvelopeestimation.hashnode.dev1 post

Migrate Hardware LB to a Software LBharhware-to-software-lb-migration.hashnode.dev1 post

RATE LIMITERratelimiter.hashnode.dev1 post

Design Consistent Hashingconsistenthashing.hashnode.dev1 post

About

Nothing here yet.

Available for

Nothing here yet.

Yashveer Singh's blogs

SCALE FROM ZERO TO MILLIONS OF USERSsystemdesignsfztmu.hashnode.dev1 post

Back-of-the-Envelope Estimationbackoftheenvelopeestimation.hashnode.dev1 post

Migrate Hardware LB to a Software LBharhware-to-software-lb-migration.hashnode.dev1 post

RATE LIMITERratelimiter.hashnode.dev1 post

Design Consistent Hashingconsistenthashing.hashnode.dev1 post

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Recently published

YSYashveer Singhinwhatsapparchitecture.hashnode.dev·Mar 13 · 7 min read

How WhatsApp Handles 100 Billion Messages a Day — The Architecture Behind the Magic

"We had 50 engineers. We had 900 million users. And it worked." — WhatsApp Engineering Team If you've ever wondered how WhatsApp delivers your "Good Morning 🌅" to your mom in under a second — across

YSYashveer Singhinnode-single-threaded.hashnode.dev·Feb 26 · 6 min read

Node.js: Single-Threaded, Yet Handles Thousands of Requests — Here’s Exactly How

“How can something single-threaded handle 10,000 concurrent requests?” — Every developer’s first Node.js confusion. By the end of this article, you won’t just understand the answer — you’ll be able t

YSYashveer Singhinmercurialvsgitexplained.hashnode.dev·Dec 28, 2025 · 5 min read

Mercurial Explained: Why Facebook Used It, Its Features, Pros & Cons — and How It Differs from Git.

Introduction When people talk about version control today, Git dominates the conversation.But Git is not the only distributed version control system — and it is not always the best fit for every scale. Mercurial is a distributed version control syste...

YSYashveer Singhinnodevsspring.hashnode.dev·Dec 25, 2025 · 3 min read

From Node.js to Spring: What Changed in How I Design APIs

When I started backend development with Node.js, my focus was simple:get the API working, return the response, move on. Then I moved to Spring, and something interesting happened —my code style didn’t just change, my thinking did. This blog is not ab...

YSYashveer Singhinapigateway.hashnode.dev·Sep 29, 2025 · 5 min read

🚀 Understanding API Gateways: The Backbone of Modern Microservices

In the era of microservices, building scalable, secure, and reliable APIs is essential. At the heart of this architecture lies the API Gateway, the silent workhorse connecting clients to services efficiently. 🌟 What is an API Gateway? An API Gateway...