[1][2] 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.
[3][4] In the 2023–24 campaign, 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.
[5] Sandin Pellikka helped Skellefteå AIK claim the Le Mat Trophy in winning the SHL championship, tallying 7 points in 14 playoff games.
[7] Sandin Pellikka represented Sweden at the 2024 World Junior Ice Hockey Championships and won a silver medal.