 Eren started his career playing for his local side Çamdibigücü, before moving to professional side Altay at the age of 14.He stayed with the first division club until the age of 19, when he signed a four-year contract with Süper Lig side Kayserispor.Eren appeared for the Turkish side in the 2008 Toulon Tournament, scoring a goal in Turkey's 3–2 victory over the United States.