[5] The start of the 2013–14 season saw Kuipers beginning with the reserves team Jong Ajax who had recently been promoted to the Dutch Eerste Divisie, the 2nd tier of professional football in the Netherlands, having previously played in the Beloften Eredivisie.

[6] On 8 September 2013, Kuipers wore the captain's arm band for the first time for Jong Ajax in the away match against Achilles '29, which ended in a 2–1 loss.

[14] Kuipers made his debut for the Dutch national team playing for the under-16 selection in their 2009 appearance in the 11th Tournoi Val de Marne in Paris, France.

[15] Two months later he appeared in the Nike International friendlies tournament '09 in Phoenix, Arizona playing in two fixtures, namely against Portugal U-16 on 5 December 2012, which ended in a 2–1 win, and against the United States U-16 which resulted in a 3–0 victory for the Dutch.

[16] His final two appearances for the under-16 squad were at the Albufeira 4 nations tournament in Portugal where his side would face Italy U-16 and Ireland U-16 losing the first match 3–1, while securing the 3–1 win in the following fixture.