In his career he played for Pirin Blagoevgrad, CSKA Sofia, Dobrudzha Dobrich and Litex Lovech, making a name for himself with the latter when they won their first two domestic titles in the late 1990s.

[3] On 14 November 2002, Stoilov (who was at the time the captain of Litex Lovech and was suffering from a broken foot, which had occurred after being subjected to a tackle in a game against CSKA Sofia), was seriously wounded, sustaining life-threatening injuries, after being shot by former army serviceman Simeon Mechev, following a traffic dispute.

[4] Stoilov managed to recover after extensive treatment, but the incident effectively spelt the end of his playing career.

[6] Stoilov earned his first cap for Bulgaria on 25 March 1998, in the 0:1 away loss against Macedonia in a friendly match, substituting Krasimir Balakov in the 73rd minute.

Following his retirement, Stoilov became part of the organizational management of Litex Lovech, continuing in this role with CSKA Sofia since 2016.