There are a number of expat-focused websites which will have job listings:
Mymerhaba.com has an online forum including job listings. It is the most well-known online expat networking tool and has a lot of great information on all sorts of things, from doctors to schools. Free, all ages
- Internations - A sort of facebook for expats, it's along the lines of the forums but much more user-friendly. They have some jobs listings. Despite the fact it is nominally for expats, it's more than half Turks, including a fair few men who think it is a dating service and not a social network. However, they organize events at some really great bars/clubs and attract a decent crowd of professionals, generally 25-40 years old. Cover is usually 15 TL for events (which includes a free drink), or you can join for 3 or 4 euro a month to get free entry.
- AlumniTurk.com is for graduates of American or European Universities. It aggregates a lot of the alumni club goings-on and also has some job listings.