Hacker News
Hacker News is a social news website focusing on computer science and entrepreneurship.
Best for: Designers and developers.
Tooltip: Use Kristopolous' nifty console script to search the thread [https://news.ycombinator.com/item?id=10313519].
A regular “Ask HN: Who Is Hiring?” thread appears at the beginning of every month on Hacker News with job posts from hiring companies.