At the 2007 World Junior Curling Championships she played second for the Swiss team, skipped by Sandra Zurbuchen.

The team wrapped up the round robin tournament with a 5–4 record, in a three-way tie for fourth place.

They won their first match by beating Norway's Kristin Moen Skaslien, but they lost in the second tie-breaker to Scotland's Sarah Reid.

The 2013–14 season was a breakthrough year for Kaufmann and teammates Binia Feltscher, Irene Schori and Christine Urech.

At the start of the season, they won the 2013 Red Deer Curling Classic and made the playoffs of the Stockholm Ladies Cup and the Women's Masters Basel.

[3] The following season, Team Feltscher won the 2014 European Curling Championships by defeating Anna Sidorova in the final.

They finished the round robin of the 2016 World Women's Curling Championship once again with a 9–2 but this time in first place, giving them hammer and choice of stones in the 1 vs 2 game.

Up 7–6 in the last end, they forced Fujisawa to draw for one to tie the game but she was to heavy, giving Kaufmann and her team their second World Women's Curling Championship gold medal and title.