[2] He started to play handball at the age of nine in the elementary school and later became a member of the ETO-SZESE Győr FKC youth team.

The talented left winger quickly caught the eyes of Hungarian top club Veszprém KC, and he was signed by the champions in 2000.

He won a gold medal at the European Youth Championship in 1999 and led the Hungarian national team to fourth place at the Junior World Championships in 2001.

He made his full international debut against Austria on 26 October 2000.

His wife, Vera gave birth to a boy, Máté, on 3 February 2009, soon after Iváncsik returned from the World Championship.