Demir played for his school team before Karadeniz Ereğli Belediyespor signed him to a youth contract in 2002. When asked what his goals were as a footballer, Demir replied "I didn't have any goals when I started playing football. It was just a game for me, but then I was signed to Karadeniz Ereğli Belediyespor. It was then I started thinking of what I wanted to accomplish... I wanted a better life for my family." Demir's favorite footballer is Fatih Tekke, a fellow striker from Trabzon.