Career
Who is mainly specialized in the freestyle distances, up to 200 m, and is part of the Dutch national team She is currently training in Amsterdam under the guidance of Martin Truijens together with Olympic Champions Femke Heemskerk and Manon van Rooijen. De Jonge made her international debut in Helsinki at the European Short Course Swimming Championships 2006.
Individually she ended up 22nd in the 50 m freestyle and 18th in the 100 m freestyle.
At the European Short Course Swimming Championships 2007 in Debrecen she only swam in the heats of both relays. 2008
In March 2008 during the 2008 European Aquatics Championships in Eindhoven in her homecountry she swam time-trials for the 2008 Summer Olympics and qualified herself for the 4 × 100 m and 4 × 200 m freestyle relay.
In this final she was replaced and did not swim, but her team mates finished fourth. Individually she started in the 200 m freestyle and ended up 18th.
2008 Summer Olympics
De Jonge was selected for the 2008 Summer Olympics in Beijing in where she formed a team with swimmers like Inge Dekker, Chantal Groot, Femke Heemskerk, Linda Bank, Ranomi Kromowidjojo, Manon van Rooijen, Hinkelien Schreuder, Jolijn van Valkengoed and Marleen Veldhuis.
She did not qualify for an individual event, but was eligible to swim for the team in the three relay events (4 × 100 m freestyle, 4 × 200 m freestyle, 4 × 100 m medley). She was not chosen to swim in the 4 × 100 m freestyle, but did swim in the series for the 4 × 200 m freestyle, finishing fifth and being eliminated.