When google has an opening they post it on their own site.
My index provides three items of value: a list of tech employer organized geographically, links to their jobs pages and link to their contact pages.
Its not always obvious what businesses are in one's city. Quite commonly jobs are posted on corporate sites but the jobs section of their own sites arent linked from anywhere. I often have to guess:
example.com/careers example.com/careers.htm example.com/about/jobs.aspx
Im working on a python program that will try out all the common locations.
Among the reasons that startup companies fail is that their websites are steaming piles.