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@rohan22

Rohan Kumar

@rohan22

Learning

Joined December 2025

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Rohan Kumar's blogs

What is Middleware in Express and How It Workswhat-is-middleware-in-express.hashnode.dev2 posts

Understanding Network Devicesunderstandingaboutnetworkdevices.hashnode.dev1 post

DNS Record Typeslearningaboutdnsrecordtypes.hashnode.dev1 post

How DNS Resolution Worklearningaboutdnsresolutionworking.hashnode.dev1 post

Getting started with cURLunderstandingaboutcurl.hashnode.dev1 post

About

Nothing here yet.

Available for

Nothing here yet.

Rohan Kumar's blogs

What is Middleware in Express and How It Workswhat-is-middleware-in-express.hashnode.dev2 posts

Understanding Network Devicesunderstandingaboutnetworkdevices.hashnode.dev1 post

DNS Record Typeslearningaboutdnsrecordtypes.hashnode.dev1 post

How DNS Resolution Worklearningaboutdnsresolutionworking.hashnode.dev1 post

Getting started with cURLunderstandingaboutcurl.hashnode.dev1 post

Articles Comments

Recently published

RKRohan Kumarinexpovsreactnavigation.hashnode.dev·May 23 · 18 min read

Expo Router vs React Navigation — Which One Should You Use in 2026?

A student's honest, practical guide to picking the right navigation tool no fan-boy nonsense Let's Start With a Problem You've Already Had You've just built your first few screens in React Native. Yo

RKRohan Kumarinhow-big-companies-built-today-using-expo-router.hashnode.dev·May 22 · 17 min read

How Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo Router

A student's deep-dive into production-grade mobile architecture with React Native Hey, Let's Talk About Why Your Folder Structure Is Already Failing You When I first started building React Native app

RKRohan Kumarinnodejs-event-loop-explained-easy.hashnode.dev·May 10 · 10 min read

The Node.js Event Loop Explained

Let's start with the honest version of what Node.js is: A single-threaded JavaScript runtime. One thread. One call stack. One thing at a time. Now here's the question that follows immediately: if Node

RKRohan Kumarinblocking-vs-nonblocking-code-in-node-js.hashnode.dev·May 10 · 10 min read

Blocking vs Non-Blocking Code in Node.js

Imagine you're at a coffee shop. You walk up to the counter and order a latte. In one version of this coffee shop, the barista freezes completely still staring at the espresso machine until your drink

RKRohan Kumarinnode-js-perfect-building-web-app.hashnode.dev·May 9 · 11 min read

Why Node.js is Perfect for Building Fast Web Applications

Here's a question that confuses a lot of developers: "Node.js runs on one thread. A single thread can only do one thing at a time. So how can Node.js be fast?" The answer involves rethinking what "fas