Sandin-Pellikka played as a youth within
Skellefteå AIK organization and made his professional debut in the
Swedish Hockey League (SHL) during the
2022–23 season. In the
2023–24 season, Sandin-Pellikka played his first full season in the SHL with Skellefteå AIK, recording 10 goals and 18 points from the blueline in 39 games. His 10 goals were the most of any under-19 skater and he was named the recipient of the
Salming Trophy as the best Swedish-born defenseman in the SHL. Sandin-Pellikka helped Skellefteå AIK claim the
Le Mat Trophy in winning the SHL championship, tallying 7 points in 14 playoff games. On 17 October 2025, Sandin-Pellikka scored his first NHL career goal for the
Detroit Red Wings. in a game against the Tampa Bay Lighting. ==International play==