This question already has an answer here:
Go to SO Careers 'Support' page: https://careers.stackoverflow.com/support
Then, click on the 'How to Write a Great Developer Job Listing' link under the 'More Information' section.
The link currently points to: http://blog.stackoverflow.com/2011/08/how-to-write-a-great-developer-job-listing/
Upon doing Google search I found: http://careers.stackoverflow.com/resources/great-job-listing
I believe this is a correct link.