She was the alternate on the Swiss team (skipped by Silvana Tirinzoni) that won the 1999 World Junior Championships, but she did not play any games.

Schäfer skipped the Swiss team at the 2000 and 2001 World Juniors, finishing fourth and winning the bronze medal respectively.

In 2000, she lost to the U.S. team (skipped by Laura Delaney) in the bronze medal game, 8–5.

She had to beat Moe Meguro's Japanese team to capture the bronze in 2001, winning the game 5–4.

They avenged their defeat at the 2008 Ford World Women's Curling Championship when they won the bronze medal; once again she had to beat Japan and their skip, Meguro.