Katharina Hautz, who spent five years as the development manager for Crytek, joins the Rovio Stockholm team an a Senior Producer.
During her time with Crytek, Hautz worked on both Crysis 2 and 3, helping to develop the singleplayer campaign and multilayer features.
The news was revealed today by Rovio General Manager Oskar Burman on his Twitter page.
Rovio is assembling quite the team, with Burman formerly of EA's Easy Studio and ex-DICE developer Patrick Liu also working there.
The studio is working on an as yet unannounced project, which we should find out about sometime this year.