Pallas was born in
Helsinki. In his early playing career, he played for the youth sectors of
FC Honka in
Espoo and
Käpylän Pallo (KäPa) in
Helsinki. Pallas made his senior debut with KäPa first team in the third tier
Kakkonen, on 4 May 2019 against
Pallo-Iirot. He played one season with KäPa in Kakkonen before moving back to FC Honka organisation to their reserve team
Honka II in 2020.
AC Oulu After playing in Kakkonen for three seasons, with Käpylän Pallo and Honka II respectively, Pallas accepted an offer from the
Veikkausliiga side
AC Oulu. He signed a professional contract with the club on a two-year deal starting in January 2022. Pallas made his Veikkausliiga debut on 24 April 2022 after being named in the starting line-up in away game against
IFK Mariehamn, playing full 90 minutes. He quickly made a breakthrough and established his place in the starting line-up in the league, becoming an integral part of the team. Pallas scored his first Veikkausliiga goal on 11 September 2022, in a 6–1 away win against
HIFK In the
2023 season, Pallas played more minutes than any other player in the team. After the season, it was announced that Pallas will depart from AC Oulu.
HJK Helsinki On 20 November 2023, it was reported in Finnish media that Pallas had signed a contract with
HJK, on a multiple-year deal. On 18 December 2023, HJK confirmed the signing of Pallas on a three-year deal, starting in January 2024. He debuted with his new club on 26 January 2024, in a
Finnish League Cup win against
IFK Mariehamn, playing full 90 minutes. On 19 June 2024, Pallas scored his first goal for HJK in Veikkausliiga, a winning goal in a 3–1 home victory over
Kuopion Palloseura (KuPS). He also represented HJK in the
2024–25 UEFA Conference League league phase.
Vålerenga On 10 January 2025, Pallas moved to Norway and signed with newly promoted
Eliteserien club
Vålerenga, signing a four-year deal for an undisclosed fee. Pallas made his debut for the club in Eliteserien on 30 March, in a season opening match against
Viking FK, helping his side to a 3–1 home victory. == International career ==