David is CTO and co-founder of TheCodingMachine, a French IT company specialized in PHP development. He is the co-editor of PSR-11, the standard that provides interoperability between dependency injection containers. David is the lead developer of many open-source packages including [Safe](https://github.com/thecodingmachine/safe/), a rewrite of PHP functions that throw exceptions instead of returning false, [GraphQLite](https://github.com/thecodingmachine/graphqlite) and an easy to use GraphQL library.