Twitter runs a whole range of different technologies, as you can see from their Github page [1]. Much of their performance-sensitive code is Scala, but they als

Twitter runs a whole range of different technologies, as you can see from their Github page [1]. Much of their performance-sensitive code is Scala, but they also run Python, Ruby, C, and Javascript tools. Their front-end, however, remains Ruby. The link you posted is just about search infrastructure. [1]: http://twitter.github.com/ http://twitter.github.com/