Design Chat System

 Functional Requirements:

  • Login, Authorisation, User profile
  • One to One chat
  • Group Chat
  • Online Presence
  • Message Delivery Notification
  • Push notification when user is offline
Non Functional Requirements:
  • High Availability
  • Scalability, high throughput
  • Keep chat history forever

1. Login Authorisation and User Profile



2. One to One Chat



3. Group Chat





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