Early career Moder was born in
Szczecinek. He began his steps towards becoming a footballer at Fortuna Wieleń, and in 2011, he joined
Warta Poznań as an academy player.
Lech Poznań In 2014, Moder joined
Lech Poznań's academy, and was promoted to the
reserve team in 2016. On 2 April 2018, he made his first team debut for Lech Poznań in a 1–3 win away against
Wisła Kraków, coming on as a substitute.
Odra Opole (loan) On 18 June 2018, Moder was loaned to
I liga side
Odra Opole.
2019–20 season After returning from his loan spell at
Odra Opole, Moder extended his contract with Lech Poznań until 2023, and quickly became a regular starter under
Dariusz Żuraw. He got his first assist for Lech Poznań in a 3–1 away win against
Górnik Zabrze, and in February 2020, he scored his first goal for 'Kolejorz' in a 3–0 home win against
Raków Częstochowa. On 20 June 2020, Moder scored a free-kick from outside the box to help Lech defeat
Piast Gliwice in a 2–0 away win. He was voted as the Best Youth Player of the month in
Ekstraklasa for June 2020.
2020–21 season Moder was a key in Lech Poznań's qualification for the
2020–21 UEFA Europa League, providing an assist in a 3–0 home win against
Valmiera.
Brighton & Hove Albion On 6 October 2020, he signed for
Premier League side
Brighton & Hove Albion for a reported transfer fee of over £9 million.
Lech Poznań (loan) Moder was immediately loaned back to former club
Lech Poznań, initially until the end of the season (this depended on Lech Poznań's progress in the
UEFA Europa League). Despite Lech Poznań's poor start to the
2020–21 Ekstraklasa season, Moder helped the team by scoring 4 goals and providing 2 assists. On 22 October 2020 he made his
UEFA Europa League debut, in the
2020–21 group stage home game against
Benfica, where Lech was defeated 4–2. On 18 December, following Lech Poznań's exit from the
2020–21 UEFA Europa League, it was announced that Moder would be recalled from his loan spell on 31 December 2020. Moder made his final appearance for Lech Poznań on 19 December 2020, in a 1–0 home defeat to
Wisła Kraków.
2020–21 season Moder made his debut for Brighton on 10 February 2021, starting and playing the full match in the 1–0 away defeat against
Leicester City in the
FA Cup fifth round. He made his Premier League debut on 27 February coming on as a substitute for
Ben White in the 84th minute in a 1–0 away loss at
West Bromwich Albion. He made his first start in the league for the "Seagulls" on 20 March in a 3–0 home win over
Newcastle United to help Brighton go six points clear of the bottom three. Moder played in Brighton's 3–2 home victory over champions
Manchester City on 18 May, with fans returning to football, in which they went from 2–0 down to beat City for the first time in a League game since 1989.
2021–22 season Moder set up Albion's equaliser with his ball into the box met by a sliding
Neal Maupay with
Alexis Mac Allister scoring the winner five minutes later in the 2–1 away victory over
Burnley on 14 August in the opening game of the
2021–22 season. Moder scored his first Brighton goal, opening the scoring in the 2–0 away victory over
Championship side
Cardiff City on 24 August, in the
EFL Cup second round in what was also his
League Cup debut. He scored his second Brighton goal on 8 January 2022, again coming in cup competition, this time in the
FA Cup third round where he scored the equaliser and assisted Maupay's winner in the 2–1 – after extra-time – away victory at Championship side West Bromwich Albion. On 2 April, during the 0–0 home draw against
Norwich City, Moder landed awkwardly which resulted in an injury to his
anterior cruciate ligament (ACL). As a result, he not only missed the rest of the season but would ruin his hopes of playing at the
2022 World Cup.
2022–23 season Moder missed the whole of the
2022–23 season with the injury he sustained in April 2022. He made his return to training one year after his injury in April 2023.
2023–24 season In early October 2023, Moder was reportedly participating in full training and played in a behind-closed-doors friendly game. Jakub Moder made his first appearance for Brighton since April 2022 when he came on as a sub against Nottingham Forest in Brighton's 3–2 victory on 25 November 2023.
Feyenoord On 20 January 2025, Moder transferred to Dutch club
Feyenoord on a permanent basis for an undisclosed fee. He made his debut on 2 February, starting in a 2–1
De Klassieker loss to
Ajax. On 11 March 2025, Moder scored his first
UEFA Champions League goal in the second leg of the Round of 16 tie against
Inter Milan, which Feyenoord lost on aggregate 1-4. ==International career==