Since there's (at the time of this writing) 827 jobs here, I wrote a script you can copy and paste into the web console to search the posts (available here: <a href=")
There is both OR and AND support here.  If you specify your function parameter as an ARRAY then it operates as an AND, otherwise each argument is an OR.
For instance, to see posts that are remote and python OR remote and ruby, you can do
query(['remote','python'],['remote','ruby']);
The return of the function shows how many jobs were shown versus in total. For instance, as of this writing, I get the following result when running the above function:
{ shown: 56, total: 827 }
Ask HN: Who is hiring? (August 2015)