*Club domestic league appearances and goals, correct as of 12:00, 18 August 2024 (UTC) ‡ National team caps and goals, correct as of 08:45; 11 October 2024
In June 2022, after an impressive spell with the youth teams of Zulte Waregem, Demuynck signed his first professional contract until June 2025.[3][4] A month later, he made his Belgian Pro League debut in a 2–0 win against Seraing, coming in as a substitute replacing Jean-Luc Dompé in the 83rd minute.[5] On 9 September 2023, Demuynck scored his first professional goal in a win against Sint-Lenaarts in the sixth round of the 2023–24 Belgian Cup. He came in as a second-half substitute, replacing Alioune Ndour, scoring a goal eighteen minutes later to make it 4–1.[6] Six days later, Demuynck scored his second professional goal in a 4–2 win against Jong Genk in the Challenger Pro League. He came in as a substitute in the 73rd minute, replacing Robbe Decostere and scored Zulte Waregem's third goal sixteen minutes later.[7][8] In February 2024, Demuynck signed a contract extension with Zulte Waregem until 2027.[9][10]
International career
Demuynck was born in Belgium to a Belgian father and a Filipino mother, making him eligible to play for Belgium or the Philippines at international level.[citation needed]
Belgium U15
Demuynck scored on his debut for Belgium U15 in a 3–1 away win against England U15.[11]
Belgium U20
In November 2023, Demuynck was among the players called up by Thomas Vermaelen for the Belgium U20 national team.[12] He made his debut in a 2–2 draw against France U20, coming in as a substitute for Nolan Martens in the 86th minute.[13]
Philippines
In March 2024, Demuynck was reportedly one of the players being recruited by head coach Tom Saintfiet and team manager Freddy Gonzalez to play for the Philippines.[14] A month later, Demuynck was visited by the Belgian coach himself on one of his scouting trips in Europe, together with Philippine Ambassador to Belgium Jaime Victor Ledda. He also received his Philippine passport during the visit.[15]
