Career
Janzen was selected for the Germany women"s national ice hockey team in the 2014 Winter Olympics. She played in all five games, recording one assistant As of 2014, Janzen has also appeared for Germany at one IIHF Women"s World Championships, in 2011.
Janzen made three appearances for the Germany women"s national under-18 ice hockey team, at the IIHF World Women"s U18 Championships, with the first in 2009.