On 21 August 2018, Levski Sofia announced the signing of Vaštšuk on loan for the 2018–19 season, with an option to make the move permanent at the end of the season.[4]
On 5 January 2023, Vaštšuk signed for League of Ireland Premier Division club Sligo Rovers on a two-year deal with the option of a third.[7] On 18 July 2023, it was announced that Vaštšuk's contract had been mutually terminated after making just 8 appearances in the clubs 24 games up to that point.[8]