Nilla started the record company Gecko Music in 2004 and debuted with the album Redemption Skyat the end of that year. The sequel Shellshocked came 2008. In 2010, Nilla released two albums, the ambient Shadows (in January) and Higher Ground (inJune).

Soon after Redemption Sky was released, she traveled to Thailand to gather strength in her favorite element among sharks, dolphins and other sea creatures. Nilla was severely injured in the tsunami on Phi Phi Islands and was sick with infections more than a year thereafter. The experience has naturally been reflected in her creation. The moving song “Himmelen måste saknat sin ängel” (single in 2008), is dedicated to all missing.

In January 2010 she released her third album, ambient Shadows. In June 2010, Nilla Nielsen released her fourth album, Higher Ground, which she wrote, produced and in which she plays most instruments herself.

In July 2012 Nilla released her fifth album, Så nära. It’s the first time she has released an album entirely in Swedish. The album has received good reviews.

Nilla Nielsen has also worked with and written lyrics for other artists, such as Dan Hylander,Janne Bark, Nils Erikson and Roger Pontare. During 2009-11, Nilla Nielsen toured with Dan Hylander & Orchestra. She have also performed with Mikael Rickfors and Lasse Lindbom.

Nielsen retrieves her influences from the likes of U2, Jimi Hendrix, Alanis Morissette, Bob Dylan and Tracy Chapman, which many times has resulted in a personalized mix of rock ballads and indie pop.