---
title: "Discussion on \"Backend behind real time systems\" | Hashnode"
description: "Discussion on \"Backend behind real time systems\". How do messages appear instantly in apps? Learn polling, SSE, and WebSockets with simple explanations and real-world use cases."
url: "https://hashnode.com/posts/backend-behind-real-time-systems/69e8ee685d1c1071056f19de"
---

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# [Backend behind real time systems](https://nerdyneha.hashnode.dev/backend-behind-real-time-systems?utm_source=hashnode&utm_medium=feed)

How do messages appear instantly in apps? Learn polling, SSE, and WebSockets with simple explanations and real-world use cases.

Apr 22 · 4 min read · nerdyneha.hashnode.dev  
Read the article

-   [#chaicode](https://hashnode.com/tag/chaicode)
-   [#websockets](https://hashnode.com/tag/websockets)

## Written by

[Neha Chopra](https://hashnode.com/@nerdyNeha)

@nerdyNeha · Karnataka, India

  
[View profile](https://hashnode.com/@nerdyNeha)

Developer | Finance writer

Neha Chopra | Finance Writer → Full-Stack Developer in Progress I write finance case studies and analytical articles, and I’m currently transitioning into web development. Passionate about building clean, functional web experiences while bringing an analytical mindset from finance into tech.

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