[1] He played for the national team, winning a silver medal in the World Handball Championship in 2007 and a bronze in 2009 and 2015.

He announced his retirement from the national team on 13 April 2012, following the unsuccessful Olympic campaign of Poland.

[2] On 11 June 2010, Bielecki received severe eye injury during a friendly match against Croatia.

[4] On 1 February 2015, Poland, including Bielecki, won the bronze medal of the 2015 World Championship.

[5][6] He participated at the 2016 Summer Olympics in Rio de Janeiro, where he was the topscorer in the men's handball tournament.