Ziani made his professional debut on 21 May 2010, scoring a four-round points decision (PTS) victory against Jerry Cagniac at the Salle Polyvalente des Ramiers in Blagnac, France.
[2] He compiled a record of 8–0–1 (1 KO) before defeating Carel Sandon via ninth-round corner retirement (RTD) on 8 July 2011, capturing the vacant WBC International Silver lightweight title at the Piazza XX Settembre in Civitanova Marche, Italy.
[5] Following four more victories, one by stoppage, he suffered the first defeat of his career on 7 December 2013 at the Gymnase Georges Racine in Clichy, France, losing by twelve-round UD against Samir Kasmi in a bid for the vacant European Union super-featherweight title.
[6] He bounced back with a PTS victory against Sebastien Cornu in March 2014 before defeating Yoann Portallier on 6 June at the Salle Polyvalente des Ramiers, capturing the French super-featherweight title via UD over ten rounds.
[10] Following three PTS victories, he made a second attempt at the vacant European super-featherweight title, facing Juli Giner on 2 February 2019 at the Palau Olímpic Vall d'Hebron in Barcelona, Spain.