As a youth player, Defreitas-Hansen joined the
youth academy of American side
Weston FC. In 2017, he joined the
youth academy of English
Premier League side
Everton FC. Welsh newspaper wrote in 2021 that he "regularly trained with England's number one goalkeeper
Jordan Pickford" while playing for the club. Four years later, he joined the
youth academy of Welsh side
Swansea City AFC and was promoted to the club's senior team the same year, where he made zero league appearances and scored zero goals. Following his stint there, he signed for English side
Atherton Collieries AFC in 2022. Ahead of the
2024 season, he signed for American side
Houston Dynamo 2, where he made ten league appearances and scored zero goals. Subsequently, he signed for American side
Colorado Rapids in 2025. On 27 April 2025, he debuted for the club during a 1–1 home draw with
Seattle Sounders FC in the
league. ==International career==