[2] Born and raised in Ede, Netherlands, de Bondt began his football career playing for the youth ranks of local amateur side SV Otterlo.

While playing for the Ajax A1 youth squad in 2011–12, de Bondt helped his side to win the Nike Eredivisie league title,[5] as well as finishing as runners-up to Inter Milan in the NextGen Series (the Champions League equivalent for under-20 teams) after losing on penalties (5–3) following a 1–1 deadlock after extra time.

Jong Ajax had recently been promoted from the Beloften Eredivisie, and were now competing in the Dutch Eerste Divisie, the 2nd tier of professional football in the Netherlands.

Having been sidelined due to an injury, de Bondt did not make his professional debut until matchday 11, where he substituted in for Boban Lazić in the 74' minute, in the 3–1 away loss to SBV Excelsior in Rotterdam.

He helped the Netherlands U-17 qualify for the 2011 UEFA European Under-17 Football Championship in Serbia, appearing in 1 match during the qualification process of the tournament which the Dutch were able to win defeating Germany U-17 5–2 in the final.