Ruby on Rails

https://rubyonrails.org/ A web-app framework that includes everything needed to create database-backed web applications according to the Model-View-Controller (MVC) pattern.

Building GitHub with Ruby and Rails - https://github.blog/2023-04-06-building-github-with-ruby-and-rails/ - Since the beginning, GitHub.com has been a Ruby on Rails monolith. Today, the application is nearly two million lines of code and more than 1,000 engineers collaborate on it daily