Since making her debut for the Switzerland women's national football team in June 2007, Bachmann has won over 50 caps. She made her reputation with Switzerland's youth national teams, playing at the 2006 and 2010 editions of the FIFA U-20 Women's World Cup and being named UEFA's Golden Player at the 2009 UEFA Women's Under-19 Championship. At senior level Bachmann helped Switzerland qualify for the FIFA Women's World Cup for the first time in 2015. A persistent back injury hampered Bachmann's progress during the early part of her career.