Maja Solveig Kjelstrup Ratkje, composer and performer (born Dec. 29th 1973 in Trondheim, Norway), finished composition studies at the Norwegian State Academy of Music in Oslo in 2000. Her music is performed worldwide by performers such as Ensemble Intercontemporain, Klangforum Wien, Oslo Sinfonietta, The Norwegian Radio Orchestra, BBC Scottish Symphony Orchestra, and many more.

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 and BRAK RUG. She has been soloist with orchestras such as The Norwegian Radio Orchestra, Ensemble Intercontemporain, Klangforum Wien, and many more. Ratkje has performed her own music for films, dance and theatre, installations, and numerous other projects.