For a 'large' webapp I would honestly go with Java. A good stack is Jetty for the http server, and Jersey/JAX-RS for the web framework. The JVM is unbeatable, and you will have an easy time onboarding people since everyone knows Java.
It's not as 'hip' as Rails/Django but you will be very productive and you will have the benefit of the plethora of Java libraries out there that are performant and reliable. Not to mention the great profiling tools.
It's not as 'hip' as Rails/Django but you will be very productive and you will have the benefit of the plethora of Java libraries out there that are performant and reliable. Not to mention the great profiling tools.