Early club career In 2011, Krmenčík was promoted to the first team and in April of the same year he made his debut in a game against
Příbram. In the
2011–12 season, he went on loan to Banik Sokolov, scoring his first professional goal. In the following four seasons, Krmenčík went on loan spells at
Zenit Čáslav,
Vlašim,
Baník Ostrava and
Dukla Prague in the Czech leagues. He returned to Viktoria Plzeň in the second half of the
2015-16 season and his career began to gain momentum. Krmenčík scored three times in nine games, winning a place in the team's starting XI.
Viktoria Plzeň By January 2020, Krmenčík managed to impress many playing for Viktoria Plzeň. In 124 matches, he scored 62 goals, made 16 assists and won four trophies. He was also the league's top scorer in the
2017–18 season. A ligament rupture in the
2018–19 season kept him out of action for a long time, but he remained impressive when he returned. His displays convinced
Club Brugge of his potential.
Club Brugge In January 2020, Club Brugge spent €6 million to make Krmenčík their own. He signed a three-and-a-half-year contract with the Belgian club.
Loan to PAOK On 5 January 2021,
PAOK announced that they reached an agreement with Club Brugge for the loan of Krmenčík until the end of the 2020–21 season. On 22 May 2021, Krmenčík scored in the last minute of
Greek Cup Final, sealing a 2–1 win against league champions
Olympiacos.
Loan to Slavia Prague On 23 July 2021,
Slavia Prague announced that Krmenčík would be joining the club on a season-long loan with an obligation to make the transfer permanent if Slavia qualified for the group stage of the
UEFA Champions League. On 23 July 2022, He made his league debut by starting in a 0–1 loss against
Bali United.
Slovácko On 14 August 2024, Krmenčík signed a two-year contract with
Czech First League club
Slovácko. ==International career==