Beginning his career as a co-producer for fellow Virginian Timbaland, he has since produced for Britney Spears, Usher, Keri Hilson, T.I., Nelly Furtado, Ciara, Mariah Carey, Madonna, Whitney Houston, Missy Elliott, M.I.A., Justin Timberlake, JoJo, Joe Jonas, Simple Plan, the Clutch, Pink, T-Pain, Diddy, Meek Mill, Björk, Duran Duran and AGNEZ MO.
In the subsequent years, he produced "Love Story" by Katharine McPhee, "Innocence" and "Earth Intruders" by Björk, and "Give It to Me" and "The Way I Are" off Timbaland's second solo album.
[2] Danja produced several tracks with Timbaland and Justin Timberlake for Madonna's 2008 album Hard Candy, including its lead single "4 Minutes".
He also produced Mariah Carey's "Migrate" from E=MC², Keri Hilson's "Knock You Down" from In a Perfect World..., and P!nk's "Sober" from Funhouse.
Danja produced several singles for the recording career of songwriting collaborator Kevin Cossom, including his debut "Baby I Like It" featuring Fabolous and Diddy.