He made his professional debut in Monaco's first competitive fixture of the 2011–12 campaign, a 4–1 loss to Sedan in the Coupe de la Ligue.

[3] Having established himself in the first team, Eysseric run continued before falling out of favour with manager Marco Simone and being sent to the reserves.

[6] Four days before signing a permanent basis, he scored a brace in the first round of Coupe de France, as Nice win 3–2 against Metz.

his first game after signing for the club on a permanent basis with a fee of 1.5 million euro, scoring his third goal, as Nice won 5–0 win against Valenciennes.

This also led the Ligue 1 disciplinary committee to give Eysseric an eleven-game ban, keeping him out for the rest of the season.

[10] Soon after, Eysseric told L'Équipe that he would not appeal his eleven games ban, insisting that was the disciplinary committee's decision.

[14][15] On 31 January 2019, the last day of the 2018–19 winter transfer window, Eysseric returned to France joining FC Nantes on a loan deal until the end of the season.