The Norwegian international goalkeeper joined the Dons on an initial 18-month contract in January 2026. Standing at 6ft 2in, Bratveit came through the ranks at his hometown club FK Haugesund, making his senior debut in June 2014 at the age of 18. He went on to make almost 125 appearances for the Seagulls before moving to Swedish side Djurgårdens IF, where he spent two seasons and was part of the squad that won the 2019 Allsvenskan title. Around this time, he made his senior debut for Norwegian National Team, having previously represented his country at youth level. He played the full 90 minutes in a 1–1 UEFA Nations League draw with Austria in Vienna. The goalkeeper later had a short-term loan spell with Dutch side FC Groningen during the Norwegian off-season, before spending the 2021–22 season on loan at Nîmes in France. Further spells followed with Vålerenga, Aarhus GF in Denmark and Odds BK, before he spent the last two seasons as first-choice goalkeeper at Strømsgodset. He made his Dons debut against Motherwell on his 30th birthday in February 2026.