On 6 July 2021, De Boer signed a three-year contract with Roda JC Kerkrade. He made his debut for the club on 7 August 2021, starting against former club De Graafschap and keeping a clean sheet in a 3–0 away win. He was the team's starter in goal during the 2021–22 season, keeping 12 clean sheets in 41 total appearances, and Roda were knocked out of promotion play-offs by Excelsior on 14 May 2022.
