Van Eijk started the Eredivisie (women)|2021–22 season] as Ajax's third choice goalkeeper, behind Lize Kop and Isa Pothof, but both of them suffered injuries. This led to Van Eijk making her league debut against VV Alkmaar on 8 October 2021. On 2 March 2022, she signed a new contract with the club. On 22 June 2023, it was announced she had signed a one-year contract extension. She won the NOS Sport Award 'Viral of the Year' after she made a sharp observation about Rafael [van der Vaart]'s comments. In the summer of 2024, she signed a three year contract extension with Ajax.