Ajax Bakker made his debut for
Ajax in a 7–0
KNVB Cup win against
Te Werve on 26 September 2018. He played his second and final game for the senior team in a 3–0 cup win against
Go Ahead Eagles on 31 October 2018.
Paris Saint-Germain On 7 July 2019, Bakker signed for French side
Paris Saint-Germain (PSG) on a four-year-contract, signing as a free agent. Bakker made his debut for PSG on 29 January 2020 in a 2–0
Coupe de France win against
Pau, coming on as a substitute. He made his first start for the club in a 6–1 cup win against
Dijon on 12 February, and made his first
Ligue 1 appearance and start in a 4–4 draw against
Amiens on 15 February. After the Ligue 1 season was ended early due to the
COVID-19 pandemic, PSG was awarded the title. On 24 July, Bakker started and played all 90 minutes in the
2020 Coupe de France Final against
Saint-Étienne. The final score was 1–0 for PSG. In the
2020 Coupe de la Ligue Final on 31 July, he played the entire match as PSG won 6–5 on penalties against
Lyon. On 20 October 2020, Bakker made his
UEFA Champions League debut, coming on as a substitute in a 2–1 loss against
Manchester United. Due to injuries to left-backs
Juan Bernat and
Layvin Kurzawa, Bakker had more playing time in the
2020–21 season than he did in the previous season; by the end of the campaign, he had recorded 40 appearances. Bakker won the
Trophée des Champions and Coupe de France in his final season in Ligue 1.
Bayer Leverkusen On 12 July 2021, Bakker joined German
Bundesliga club
Bayer Leverkusen, and subsequently signed a four-year contract with the club. According to reports, the transfer fee of the deal was of €7 million, potentially rising to €10 million with contractual bonuses. A buy-back option for PSG was reportedly included in the deal. Bakker scored his first goal for Leverkusen in a 4–0 win over
Borussia Mönchengladbach on 21 August.
Atalanta On 7 July 2023, Bakker joined Italian
Serie A club
Atalanta.
Loan to Lille On 30 August 2024, Bakker returned to France, having been loaned to Ligue 1 club
Lille for the rest of the
2024–25 season. == International career ==