[2] Tjäder competed in slopestyle at the FIS Freestyle World Ski Championships 2013, and he represented Sweden in slopestyle at the 2014 Winter Olympics in Sochi,[2] where he finished 24th.

[3] Tjäder returned to the Winter Olympics for 2018 in PyeongChang, where he placed 23rd in the slopestyle competition.

[4] Tjäder again returned to the Winter Olympics for 2022 in Beijing, where he placed 3rd and secured a bronze medal in the slopestyle competition.

[5] Tjäder progressed freeskiing by innovating tricks and building never-seen-before rails.

[6] In Xgames 2024 Aspen, Jesper contended in the Knuckle huck and won a bronze after Henrik Harlaut.