In Denmark yes, but not in Copenhagen. Google's Danish development office is locate in Aarhus, near Aarhus University.

As far as I know they do have a sales office in Copenhagen though.

If he already worked at FB and Yahoo it seems he has the right qualifications.

Not necessarily.

The Danish dev team is working almost entirely on V8 and Dart which is primarily C.

They work on very specific things related to optimization of virtual machines and programming language design.

Not anymore, V8 team is now mostly located in Munich.