During his career, he played for Niort, Lorient, Paris Saint-Germain, Lyon, Nice and Amiens, as well as registering 16 caps for the France national team between 2012 and 2017.

[2] Tracked by the main club in the region, Niort, since 13, he was discouraged by his parents to pursue the move and he remained in Cognac.

On 6 July 2009, Jallet joined Paris Saint-Germain for a transfer fee of 2.5 million euros, signing a four-year contract.

Jallet made his first appearance in a competitive match with PSG against Le Mans in the second matchday of the 2009–10 Ligue 1 season.

[6] During the next match, against Lille, he delivered an assist a few minutes after he was substituted onto the pitch and marked the very end of game again with a goal.

[7] During his first season, Jallet's impact as a substitute with goalscoring potential was highly valued, though gaining a starting berth proved hard with the form of Ceará.

[16] Jallet was called up to the France national team by manager Didier Deschamps for a friendly against Uruguay on 9 August 2012.