Kassin began nude modeling in Germany when she was 20 years old. She shot her first porn scene in Germany in May 2002.  She contacted German adult actress Dru Berrymore , who invited her to travel to the United States. In March 2003, Kassin shot her first American sex scene in Straight to the A 4 . In her first month working in the United States, she shot 25 scenes. In 2015, she appeared in the mainstream film Tangerine . 
Kassin permanently moved to the Los Angeles area in late 2004 and married fellow American performer Sledge Hammer  in January 2005. They divorced in October 2006.