After starting his professional career in 1995, he edited write and directed programs such as ATV's Şok, Kanal D's Beyaz Show and Zaga, Kanal 6's Hızar, and TV8's Dikkat Şahan Çıkabilir, Zoka, Bi İş İçin Lazım and Uzman Avı.
[1] Mestçi, who prepared the anti-media / humor website named Shockhaber.com together with Hüseyin Özcan from 2001,[2][3] later published the humor content available on his website as three separate books titled Saçmala,[4] Radar Oldum, and Takıntılar respectively.
[6] In 2005, he took on the duties of directing and screenwriting for an multimedia-sketch program called Dikkat Şahan Çıkabilir[7] Alper Mestçi's film career started in 2006 when the horror story he prepared with Güray Ölgü and Şahan Gökbakar made it to the big screen and was adapted as a movie.
[8] Mestçi, who had his first film directing experience in 2007 with Musallat, wrote the movie's screenplay together with Güray Ölgü.
[11] After releasing a sequel for Musallat in 2011,[12] Mestçi started working on a series of horror movies titled SİCCÎN,[13] and meanwhile directed the comedy movies Sabit Kanca and Sabit Kanca 2.