Landin won the 2013
Men's Youth World Handball Championship along the Danish youth national team, defeating Croatia 32–26 in
OT. In 2013 Landin signed with
Nordsjælland Håndbold transferring from
HIK. In 2014 it was announced that Landin had signed a two-year contract with
KIF Kolding København starting at the begin of the 2014–15 season. He won his first Danish championship the first year at KIF Kolding Copenhagen. On 17 November 2017,
KIF Kolding København announced that Landin would leave the club at the end of the 2017–18 season. Later same day, it was announced that he would join
THW Kiel on a two-year contract starting at the begin of the 2018–19 season. His brother,
Niklas Landin, already played at the club. He also won gold at the
2024 Olympics. At the
2026 European Men's Handball Championship he won gold medals, meaning that Denmark held both the World, European and Olympic titles at the same time, as only the second team ever after France's 'Les Experts'. From the 2026-27 season, he will join
Aalborg Håndbold, once again becoming a team mate with his brother. ==Honours==