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The Framework proposed in this space (Alex Xu) is applied to propose a design : Getting started - a framework to propose...

Introduction

A chat performs different functions for different people. It is important to explore the feature requirements.

Step 1 - Understand the problem and establish design scope

Kind of chat ? 1 to 1 or group chat ?

both

Mobile or Web app ? or both ?

both

Scale of the app ? start-up or massive scale ?

massive scale : 50 millions per day of active users.

On this page.

Step 2 - High-level design

Step 3 - Design deep dive

Step 4 - Pros & Cons

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