Langasque won The Amateur Championship in 2015 at Carnoustie Golf Links, beating Grant Forrest 4 and 2 in the final.

[5] Langasque started the 2017 European Tour season by finishing tied for tenth place in the Australian PGA Championship.

He then missed the cut in 5 of the 6 other European Tour events he was able to play, the last of them being the HNA Open de France in July 2018.

Langasque had a successful start to the 2019 European Tour season, finishing second in the South African Open in December 2018.

On 29 September 2022, in the first round of the Alfred Dunhill Links Championship, Langasque tied the course record at the Old Course in St Andrews, Scotland, with score of 11-under-par 61.