Last year I talked about how we moved a large ecommerce site from Zend to Symfony 2. We now also run NordstromRack.com on this platform. This year I am going to follow up by touching on a wide variety of subjects related to enterprise applications: Yes, we are still using Symfony. Yes, we still love it. Since we have moved almost all of the code into Symfony, our concerns have shifted: We are now a lot more focused on monitoring and logging (Sentry, StatsD). What's on our dashboard, and what have we learned about performance. I want to touch on how we are moving this large monolithic application towards a Service Oriented Architecture and what we are experimenting with to support such an architecture: Containers (Docker), Service Discovery (Consul), Orchestration etc. How do we ensure our application is as testable as possible (PHPUnit, Behat, our complex build pipeline in Travis CI). Why we are using multiple Kernels and how do we handle configuration with so many bundles.