TPS Hradecky began his career in
Turun Palloseura, a club in
Turku,
Esbjerg On 10 January 2009, Hradecky
transferred to
Esbjerg fB and signed a four-year contract with the five-time Danish champions. On 3 August 2010 it was announced that Hradecky had been called to be tested for a week by
Manchester United to strengthen their goalkeeping department after the departure of
Tom Heaton. However, he chose to seek the chance to be the primary keeper in Esbjerg instead. After the
2012–13 Superliga season Hradecky's contract with Esbjerg fB expired, and an agreement to prolong the contract was not reached.
Brøndby On 12 June 2013, Hradecky joined
Danish Superliga club
Brøndby IF on a four-year contract on a free transfer. On 21 June 2013 Hradecky made his debut in the Superliga in a match against
Vestsjælland.
Eintracht Frankfurt In August 2015 Hradecky transferred from Brøndby to German
Bundesliga team
Eintracht Frankfurt. The value of the transfer was never published, but according to newspapers Eintracht paid €2.5 million to Brøndby. In 2017–18, Hradecky's last season with Eintracht, he was voted Bundesliga Goalkeeper of the Season as the club won the
DFB-Pokal title.
Bayer Leverkusen In May 2018,
Bayer Leverkusen announced the signing of Hradecky for the 2018–19 season on a free transfer. He agreed a contract until 2023. Hradecky made his debut in Leverkusen on 15 September 2018 in a match against
Bayern Munich. Since the
2021–22 season, Hradecky has captained Leverkusen. On 6 August 2022, he was sent off during Leverkusen's defeat against
Borussia Dortmund for handball after reaching out to grab the ball in front of his box. On 30 August 2022, Hradecky renewed his contract with Leverkusen, signing a deal until the end of June 2026. In the first half of the
2023–24 season under the manager
Xabi Alonso, Hradecky helped his team to a flying start leading the
Bundesliga with a streak of 16 league games without losses (25 games unbeaten in all competitions combined), recording seven clean sheets, which is the most of any goalkeepers in the league in the ongoing season. On 3 February 2024, in a 2–0 away win against
Darmstadt, Hradecky had his 80th clean sheet in 280 Bundesliga matches in his career, which is the most of any foreign-born goalkeepers in the league's entire history. On 14 April 2024, after a 5–0 home win against
Werder Bremen, Hradecky and Leverkusen secured the club's first ever Bundesliga championship title, five rounds prior to season ending. A month later, on 5 May, he featured in his 292nd Bundesliga match in a 5–1 away win over his former club
Eintracht Frankfurt, breaking
Yann Sommer's record to become the foreign goalkeeper with the most appearances in the German top tier. On 12 May 2024, in a 5–0 away win against
VfL Bochum, Hradecky had his 16th clean sheet in the season in all competitions combined, and helped Leverkusen to stay unbeaten for the record 50 consecutive games in the 2023–24 season. Hradecky and Leverkusen also won the
2023–24 DFB-Pokal, keeping a clean sheet after beating
1. FC Kaiserslautern 1–0 in the German Cup final on 25 May 2024. In June 2024, Hradecky was named the 9th best goalkeeper in the world, in the top 100 list by
ESPN. On 17 August 2024, Hradecky and Leverkusen were crowned the
DFL-Supercup champions after winning
VfB Stuttgart on penalties, completing Leverkusen's first ever triple. On 19 October, in a match against his former club
Eintracht Frankfurt, Hradecky made his 300th Bundesliga appearance, as the first foreign goalkeeper in the history of the German top tier. On 25 January 2025, after a 2–2 draw against
RB Leipzig, Hradecky became only the second player in the Bundesliga history to have played at least 50 consecutive league matches unbeaten. His streak of unbeaten matches continued to 54, which is two matches short of the Bundesliga record that was set by
Jérôme Boateng.
Monaco On 8 August 2025, Hradecky signed a two-year contract with
Monaco, through 30 June 2027, with an option to extend for one more year, for a transfer fee of €2.5 million with further €1 million in bonuses. ==International career==