We do the same using Team City and Git (on the .NET stack) although we don't merge to master until the feature in question has gone through manual QA as well.

We do the same using Team City and Git (on the .NET stack) although we don't merge to master until the feature in question has gone through manual QA as well. We have 5 QA servers and a dashboard where the tester can point any of the QA servers to a feature branch. Works awesomely.