Which stack should I choose if I want to hack Twitter?

Question

Web development

Good day.
Which stack should I choose if I want to hack Twitter?

Let's do everything according to the mind. Website + mobile application.
Let's assume that we don't know anything, neither about the front, nor about the back, nor about the databases

Question 1: What is the best database storage system to take or does something else matter?

Question 2: What is better to take for backing? php or python, or even go to node.js

Question 3: will it be possible to solve front-end tasks in a mobile application using html and css, or is it also better to take something else?

PS: of course it won't be twitter, but something like that. In order not to describe too much, I decided to take it? that everyone knows.

Thank you to everyone who won't be too joking)

Answer 1

They started with Ruby on Rails and MySQL. Now there is an extremely complex distributed infrastructure using many technologies. A solid part of the code is written in Scala.
As you rightly noted in the comments, the functionality of the tweet feed itself is primitive and you can write it on anything, but Twitter works under high loads, which radically changes the approaches to development and the requirements for developers.

Answer 2

See what they use and learn
https://builtwith.com/?https%3a%2f%2ftwitter.com%2f