Kaja (1973) started his career directing television series such as GTST, Onderweg naar Morgen and Costa! In 2005, he took up the position of Head of Creative Nickelodeon with MTV Networks and in this capacity he developed productions such as the youth series Het Huis Anubis, in cooperation with Studio 100. Under his supervision, a remake of this series was made in Germany and later in the USA. In 2008, he joined the Dutch board of MTV Networks as VP MTV Networks Productions, in which capacity he was responsible for local product from all of the stations within MTV Networks. During his last year with the company, he joined the management team of Nickelodeon Northern Europe.
In 2010, Kaja Wolffers started work at NL Film, where he was given responsibility for the development of TV series and films. Series such as Aaf, VRijland and Popoz and films such as Mannenharten have been developed and produced under his control.