# How Hotstar Built a Scalable Real-Time Emoji System for Sports Viewing

DevFeed: [How Hotstar Built a Scalable Real-Time Emoji System for Sports Viewing](<https://devfeed.tech/articles/capturing-a-billion-emo-j-i-ons-33601.md>)

Original publisher: [Read original article](<https://highscalability.com/capturing-a-billion-emo-j-i-ons/>)

Author: ByteByteGo

Published: 2024-03-26T15:32:38Z

Content type: article

Language: en

Sources: [High Scalability](<https://devfeed.tech/sources/high-scalability-3.md>)

Topics: [Emoji](<https://devfeed.tech/topics/emoji.md>), [Architecture & Design](<https://devfeed.tech/topics/architecture-design.md>), [Scalability](<https://devfeed.tech/topics/scalability.md>), [real-time](<https://devfeed.tech/topics/real-time.md>), [API](<https://devfeed.tech/topics/api.md>), [HTTP](<https://devfeed.tech/topics/http.md>), [client](<https://devfeed.tech/topics/client.md>)

Tags: [api](<https://devfeed.tech/tags/api.md>), [architecture](<https://devfeed.tech/tags/architecture.md>), [article](<https://devfeed.tech/tags/article.md>), [asynchronous](<https://devfeed.tech/tags/asynchronous.md>), [blog-post](<https://devfeed.tech/tags/blog-post.md>), [emojis](<https://devfeed.tech/tags/emojis.md>), [http](<https://devfeed.tech/tags/http.md>), [message-queue](<https://devfeed.tech/tags/message-queue.md>), [real-time](<https://devfeed.tech/tags/real-time.md>), [scalability](<https://devfeed.tech/tags/scalability.md>)

## AI overview

This article explains how Hotstar built an in-house system to collect user-submitted emojis in real time, condense them into an emoji swarm showing audience mood, and support very high submission volumes. It covers horizontal scalability, component decomposition, asynchronous processing, load balancing, auto-scaling, and HTTP API request handling.

## Source excerpt

This blog post was written by Dedeepya Bonthu. This is a repost from her Medium article, approved by the author. In stadiums, sports fans love to express themselves by cheering for their favorite teams, holding up placards and team logos. Emoji's allow fans at home to rapidly express