She has best of 11.33 seconds in the 100 metres, which she set in Krakow in 2011. Jeschke represented Poland at the 2008 Summer Olympics in Beijing. In the 200 m she did not qualify from her heat.
She competed in the 4x100 metres relay together with Daria Korczyńska, Dorota Jędrusińska and Ewelina Klocek.
In their first round heat they placed fifth behind Belgium, Great Britain, Brazil and Nigeria. Their time of 43.47 seconds was the second best non-directly qualifying time and the seventh time overall out of sixteen participating nations.
With this result they qualified for the final in which they replaced Jeschke with Joanna Henryka Kocielnik. In the final they were eventually disqualified.
She again represented Poland at the 2012 Summer Olympics, this time in the 100 m and the 4 x 100 metres.