She placed 31st in the qualifying round in the sprint, failing to advance to the knockout stages.As of April 2014, her best showing at the World Championships is 42nd, in the classical 10 kilometres in 2011.Joas made her World Cup debut in November 2009.
As of April 2014, her best finish is sixth, in a freestyle sprint race at Oberhof in the 2013–14.
Her best World Cup overall finish is 60th, in 2013–14.
Her best World Cup finish in a discipline is 34th, in the sprint in 2013-14.