Jokubaitis was born in Mažeikiai, Lithuania. He grew up playing youth basketball at the Vladas Knašius Basketball School in Klaipėda before moving to the youth academy of Žalgiris.[1] Jokubaitis was named to the all-tournament team at the 2018 Kaunas Tournament after averaging 15 points and 8.3 assists per game and leading Žalgiris to a third-place finish.[2]
On 14 June 2019, Jokubaitis signed a three-year contract extension with Žalgiris.[5] In the 2020–21 season, he averaged seven points and 2.5 assists per game in the EuroLeague. Jokubaitis was the runner-up to Usman Garuba for the EuroLeague Rising Star award.[6] He averaged eight points and four assists per game in the LKL and was named Best Young Player of the league.[7]
FC Barcelona (2021–2024)
On 21 July 2021, Jokubaitis signed a four-year contract with FC Barcelona of the Spanish Liga ACB and the EuroLeague.[8] In 2023–24 in 74 games averaging 16 minutes per game he averaged 6.2 points and 2.7 assists per gamem and shot 50% on two-point field goals. On 23 July 2024, Jokubaitis mutually parted ways with the club.[9]