Rimpinen is a product of
HCK Salamat in
Kirkkonummi. As a junior, he moved to the
Espoo Blues organization. During the 2021–22 season, he played primarily for the Kiekko-Espoo U20 team but also helped the U18 team win the Finnish Championship. For the 2022–23 season, Rimpinen moved to the
TPS U20 team. He served primarily as the backup to Noa Vali, appearing in 16 regular-season games. Rimpinen's save percentage of .931 and goals-against average of 1.75 were the best in the
U20 SM-sarja. He won a U20 bronze medal at the end of the season. In June 2023, Rimpinen returned to Kiekko-Espoo on a
Mestis contract. During the 2023–24 season, he rose through the depth chart to become the team's starting goaltender during the playoffs, eventually leading the team to a Mestis bronze medal. His .926 save percentage and 1.82 GAA were the best in the league that season. Following Kiekko-Espoo's promotion to the
Liiga for the 2024–25 season, Rimpinen made his top-flight debut on 10 September 2024 against
HIFK. He recorded his first Liiga shutout on 1 October 2024 against
SaiPa. He finished his rookie season with 40 games played and 16 wins. He made his playoff debut on 18 March 2025, recording a 31-save shutout against
Tappara. At the conclusion of the season, Rimpinen was awarded the
Jarmo Wasama memorial trophy as the Liiga Rookie of the Year, becoming the first goaltender to win the award since
Juuse Saros in 2014. He was also a finalist for the
Urpo Ylönen trophy as the league's best goaltender. In November 2025, Rimpinen signed a one-year contract extension with Kiekko-Espoo. == International play ==