Siebe Wylin started playing soccer at KSV Roeselare, but was soon accepted into Club Brugge's youth training program, where he progressed from U8 to U16.
In 2019, he made the switch to KV Oostende. There he made his debut in the Jupiler Pro League, in a match against STVV.
In the summer of 2024, Siebe Wylin returned to Blauw-Zwart and joined Club NXT U23.