Born in Hall in Tirol, Austria, Jannik Schuster started his youth career with SV Mieming before joining the Red Bull Salzburg Academy in 2020.

He began his professional career with Liefering, Salzburg’s feeder club, during the 2023/24 season and went on to make 39 league appearances, scoring twice.

Schuster made his Red Bull Salzburg debut in a 4-2 Austrian Bundesliga win over Rapid Wien in May 2025, following an impressive term with Liefering and Salzburg’s youth side.

He captained Salzburg Under-19s as they reached the semi-finals of the UEFA Youth League, before becoming a regular part of the senior squad ahead of the 2025/26 campaign.

Schuster was part of the squad for the 2025 FIFA Club World Cup, and was named among the substitutes for all three of their Group H fixtures against Pachuca, Al-Hilal and Real Madrid.

He has represented Austria at under-16, under-18, under-19 and under-21 level.