Wieczorek was born in Kłobuck, Poland. His chess career began early; by the age of 8, he achieved the 2nd place at the Polish U8 Championship. In 2012, Wieczorek obtained a FIDE Master title. He became an International Master in 2016.
Among his other achievements, Wieczorek has also won the U18 Polish Chess Championship twice, in 2017 and 2019. He has also competed in the World Junior Chess Championship twice and placed 62nd in 2019. He was the youngest Polish player to compete in this championship in 2018.