Career
Kaj Ramsteijn started at the age of 10 in the Feyenoord youth academy coming over from DWO Zoetermeer. As a central defender he faced a lot of competition in the first squad of Feyenoord. Mid June 2010 he transferred to SBV Excelsior.
He signed a 2-year contract that will keep him at SBV Excelsior until the summer of 2012.
He made his professional début on September 22, 2010 in a match against WKE Emmen. His début in the starting 11 was on October 24, 2010 against Ajax.
Ramsteijn made his first goal in a match against Willem II on November 27, 2010. The game ended in a 1-1 draw.
In 2013 he was hired by Sparta Rotterdam and a year prior to it signed a 2-year contract with Feyenoord.