Giger is a product of the youth academies of the Swiss clubs FC Gränichen and
Aarau. He began his senior career with Aarau's reserves Aargau U21 in 2015. He debuted with the senior Aarau team in a 1–1
Challenge League tie with
FC Zürich on 25 September 2016. On 18 January 2018, he extended his contract until 2021. On 21 January 2021, he extended his contract with Aarau until 2021 with an option to extend for 2 more seasons. After more than 150 matches in the Challenge League, he transferred to
Lausanne-Sport on 14 June 2022. In his first season with Lausanne-Sport they achieved promotion to the
Swiss Super League. On 12 August 2025, Giger transferred to the Polish
I liga club
Wisła Kraków on a contract until 2026 with an option to extend for another year. On 24 March 2026, the option to extend was triggerred until 2027. == References ==