I use indeed.com. It seems to pool jobs from multiple sites. I would also recommend the old fashioned method of going to company sites directly and applying everywhere. Gamedevmap.com is great for scouting out all the studios in a given location and it links to all of their sites.
Twitter is a pretty good source of game job postings. Jon Jones has his game jobs feed and there are a bunch of others there that should keep you inundated with plenty of ads.
Replies
http://canada.afjv.com/video_game_ads.php (Switch to US or wherever you live)
https://www.greenlightjobs.com/
http://www.cgstepinside.com/cg-studio/ (Similar to Gamedevmap.com)
http://www.creativeheads.net/
Vancouver VFX
http://vfxvancouver.com/ (Similar to Gamedevmap)
And good old Google
Search " google maps, game studios [location] "
I use glass door a lot to find out more about the company after I read the job posting.
http://www.glassdoor.com/index.htm
Great way to see what other employees have experienced and to see what kind of funding start ups have gotten.
http://gamejobhunter.com/blog/gamejobhunter-game-jobs-list/