User system: Including user registration, login, personal information management and other functions.

Tweet management: Users can create, edit and delete tweets. Each tweet may contain information such as text, media (images, videos, etc.) and the time it was created.

Follow system: Users can follow/unfollow other users. The following system allows users to see the latest tweets from the users they follow on their timeline.

Like and favorite: Users can like and favorite tweets. These actions will create a relationship between the user and the tweet.

Timeline: The user's homepage and timeline pages will display the latest tweets from people the user follows.

Notification system: Users can receive notifications about new followers, new tweets, likes, and more.

Search: Provides a search function that allows users to find other users, topics, or keywords and browse related tweets.

Security and Privacy: Implement necessary security measures, including user authentication, data encryption, access control, etc. Ensure user privacy is protected.

Real-time updates: Consider using WebSocket or other real-time communication technology to instantly update users' timelines and notifications as tweets are posted.

Distributed architecture: In order to support large-scale users, you can consider using a distributed architecture to horizontally expand different services.

This is just a basic outline, actually designing a complete Twitter-like social network involves much more detail and complexity. You may need to think further about the details of the database model, API design, user interface, etc., and use the appropriate technology to implement these functions.