Symfony2 and Angular.js make a great, robust combintaion. Integrating them isn't immediately obvious, however. Both communities come with their own standards and suite of tools for managing the development process, and sometimes those tools conflict.
On the Symfony side, you mainly deal with composer for managing your dependencies, a few Symfony commands in your project, and any other tools you add into the mix, like phpunit.
On the Angular side, you'll probably end up using npm, bower and probably grunt for automating some of the pain.