Not to fanboy, but the "Who is Hiring" thread posted here on hacker news on the first of each month. In my experience, the rate and speed of responses from that thread is dramatically higher than anywhere else.
Obviously it's not the UX that makes it shine, but when you're looking for work, you care about the results. I recommend that thread to anyone who mentions looking for a tech job.
I like that thread because you can load the entire thing and look for keywords relevant to your skillset - comes quite in handy when you work in a more niche market. I am not currently interested in new work but I always like to see what is out there to keep a finger on the market movements to see what is gaining popularity.
The last Who Is Hiring went on for something like 5 pages, so it was a bit clunky to search for, in-browser, but the API makes it pretty easy to scrape/search whatever you like: https://github.com/HackerNews/API