It is lacking on features at the moment, but if you are willing to do some manual filtering, you have more or less first access to a lot of jobs.
Edit: Giving credit where due (original post) - https://news.ycombinator.com/item?id=38177286
also if you're ok paying usemassive.com is just like grazily but auto-applies to jobs for you up to 50/week.
Built this to keep track of new jobs using my tech stack. Adding more filter options soon.