The 19-year-old midfielder helped Jong AZ to the second division championship last season but opted against signing a new deal.
He joins Ajax on a free transfer, on a two-year deal with the option of a third season.
Speaking to the club’s official website, he said: “I feel very honoured and happy to be able to play with Ajax.
“I very much enjoyed playing at AZ, but deep in my heart, I’ve always been an Ajax fan. It’s great that I can express that now.”
Ajax are also expected to announce the signing of Jong AZ right-back Robin Schouten.