Building a simplified social network in the style of Twitter

It is necessary to design a simplified version of a microblogging platform similar to Twitter/X, implementing a basic set of features:

• Creating posts (tweets) by users.
• Following other accounts.
• Generating a news feed containing:
  • Messages from all users the current user follows.
  • The ability to sort posts by time of publication or by popularity.
• Scalability: the system must withstand high loads — millions of active users and thousands of new tweets per second.