Rubuta ci gaba don wannan sakin layi - Sobotka an haife shi a Telnice amma ba da daɗewa ba ya koma tare da danginsa zuwa Slavkov u Brna. Ya yi karatun shari'a a Jami'ar Masaryk da ke Brno kuma ya sami digiri a shekarar 1995. Bayan faduwar gurguzu
ya taimaka sake gina Jam'iyyar Czech Social Democratic Party (ČSSD) kuma ya zama memba. Sobotka kuma ya kafa Young Social Democrats, ƙungiyar matasa ta ČSSD. An fara zabarsa a majalisar wakilai a zaben 'yan majalisa na 1996.