stackshare.io/facebook/facebook

But, please follow and do what you love.

Facebook is a major contributor to Open Source Software. They open source nearly all useful technologies that go in their product across platforms like iOS, Android, Web, Backend and hardware technologies.

Going by the GitHub Page of Facebook, they heavily uses C++, Java, JavaScript, Python and Objective-C.

• Presto written in Java
• RocksDB, a persistent key value storage, written in C++
• Facebook Historically written in PHP and solid contributor to its community. HHVM is a high performance JIT appoach . This is primarily written in C++ and PHP
• We talk more about Facebook when it comes to JavaScript stack. React is their most popula open source project.
• Looks like they're yet to catch hold of Swift.

You can see more here - code.facebook.com/projects

Someone from Facebook can contribute better to the answer.

There are lots of things there. You can see the following quora link where it being answered by people who actually worked on facebook.

quora.com/What-programming-languages-are-used-at-…

Mostly they are using PHP, Python,C,C++and Java for website and backend services Erlang for chat services.

I known that they used to use PHP but it was changed.

I am a beginner in web development. I would like your directions to evolve well. Which languages or framework can I start?