Aiás comes to Orlando following two seasons on loan with Mirandés of Spain’s Segunda División beginning in August 2018. That same year, Aiás made 41 appearances for Mirandés while netting 11 goals, helping the side achieve promotion. In 2019, he totaled 34 appearances and 12 finishes, six of which came in the Copa del Rey. In that same competition, he netted four goals in three matches against top La Liga sides Villarreal CF, Sevilla FC and Real Sociedad.
The 23-year-old forward began his senior career with Granada B, then owned by Watford, in 2015, making his senior debut on March 15 of that year. He would go on to make 61 appearances for Granada and net 18 finishes before loan spells with Lorca FC, CF Fuenlabrada and Valencia CF Mestalla.