Tip: This course is built on Symfony 2, but most of the concepts apply just fine to Symfony 3.
In this series, we get to work: by building the same API in the REST series, but leveraging all the amazing tools and libraries of the Symfony framework. If terminology like representations, resources, and hypermedia are new to you, start with the REST series and then come back. And get ready to get your (API) mind blown.
In Course 1, we'll start quick with: