At European level, she has taken part in the quadrennial European Athletics Championships three times; her best performance at the competition is eleventh place, which she achieved in both 2006 and 2010. Söderberg has been ever-present on the national scene and won every discus contest at the Swedish Athletics Championships from 1993 to 2010 – an unrivalled streak of eighteen straight victories. She has a similar pedigree at the Finland-Sweden athletics international and she won her 17th discus title at the competition in 2010. She opted to have shoulder surgery at the end of the year in order to resolve an ongoing complaint.