Requirements of WhatsApp’s Design


Our design of the WhatsApp messenger should meet the following requirements.

Functional requirements

  • Conversation: The system should support one-on-one and group conversations between users.

  • Acknowledgment: The system should support message delivery acknowledgment, such as sent, delivered, and read.

  • Sharing: The system should support sharing of media files, such as images, videos, and audio.

  • Chat storage: The system must support the persistent storage of chat messages when a user is offline until the successful delivery of messages.

  • Push notifications: The system should be able to notify offline users of new messages once their status becomes online.

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