Most Facebook Open Source Developers Don’t Work for Facebook

More than 3,400 developers have contributed to the long list of open source projects Facebook has launched, and the majority of them are not Facebook employees.

The amount of outside contributors to an open source project is one of the best measures of its relevance to the open source community, and Facebook appears to be cranking out some of the most relevant open source code out there. About 2,500 outside developers contributed to Facebook’s open source projects this year — up from 1,000 last year.

Open source software is becoming more and more important not just in the world of internet giants and startups but also in the enterprise space. Companies like Walmart, Target, and Booz Allen Hamilton, have official GitHub accounts, lists of repositories, and active teams of contributors. There is also more and more important open source software for data center operators.

Participating in open source communities is not only a way to put more eyes and brains on a common problem or get free code (it may be easy to get free open source code but making it work for your specific use case is not that simple) but also serve as effective recruiting tools for tech talent.

Facebook now has more than 330 open source repositories on GitHub, according to today’s blog post by Christine Abernathy, developer advocate on Facebook’s open source team.

Among the top five is HHVM (Hip Hop Virtual Machine), its open source virtual machine for running programs written in Hack and PHP. HHVM, which has become the go-to VM for companies like Etsy and Box, was one of the first two Facebook open source projects to reach 10,000 stars on GitHub.

Stars on GitHub are similar to Likes on Facebook. Developers “Star” projects they are interested in and want to follow.