I have been working with symfony2 since 3 or more years. I have a vast experience in Doctrine, OOP and git, using github and bitbucket.
I have a really strong sense of separation of layers, and working with BDD it just feels natural.
My previous experience working with symfony are the Chilean Government (platform for Chile scholarships), LAN Airlines(solution for incidence management) and Fundacity (a startup that created a web solution for investing in startups). All of these apps where developed from scratch in symfony.