Background
Kilian was born in Figueres, Girona, Catalonia.
Kilian was born in Figueres, Girona, Catalonia.
An RCD Espanyol youth graduate, he made his debut as a senior with the reserves in the 2011-2012 campaign, in Tercera División. On 26 January 2014 Kilian joined UE Olot in Segunda División B, on loan until the end of the season. After his loan expired, he moved to another reserve team, Real Zaragoza B also in the third tier.
Kilian made his professional debut on 19 December 2015, coming on as a second-half substitute for Jorge Díaz in a 1–3 away loss against Gimnàstic de Tarragona for the Segunda División championship.