Composer and performer, finished composition studies at the Norwegian State Academy of Music in Oslo in 2000. Her music is performed worldwide by performers such as Klangforum Wien, Oslo Sinfonietta, The Norwegian Radio Orchestra, BBC Scottish Symphony Orchestra, Fretwork, TM+, Cikada and Bozzini string quartets, Quatuor Renoir, crashEnsemble, Pearls for Swine Experience, Torben Snekkestad, Marianne Beate Kielland, SPUNK, Frode Haltli, POING and many more. Portrait concerts with her music has been heard in Toronto and Vienna, she has been composer in residence at festivals like Other Minds in San Francisco, Nordland Music Festival in Bodø, Avanti! Summer Festival in Finland, Båstad Chamber Music Festival and Huddersfield Contemporary Music Festival. Ratkje has received awards such as the International Rostrum of Composers in Paris for composers below 30 years of age, the Norwegian Edvard prize (work of the year) twice, second prize at the Russolo Foundation, and in 2001 she was the first composer ever to receive the Norwegian Arne Nordheim prize. Her solo album «Voice», made in collaboration with Jazzkammer, got a Distinction Award at Prix Ars Electronica in 2003. In 2013 she was nominated for the Nordic Council Music Prize for her vocal work. Ratkje is active as a singer/voice user and electronics performer and engineer, as a soloist or in groups such as SPUNK. Other collaborations are with Jaap Blonk, Joëlle Léandre, Ikue Mori, Zeena Parkins, Stephen O’Malley, Lasse Marhaug, POING and many more.