Career
Ježek also competed at the 2008 Summer Olympics in Beijing. In the C-1 event, he finished fourth in the qualification round, thus progressing to the semifinals. In the final he finished fifth.
At the 2012 Summer Olympics in London he repeated his 5th position in the C-1 event.
He also started in the C-2 event with Vavřinec Hradilek where they finished 9th after being eliminated in the semifinals.