0) Get a website URL & Job keyword
1) Build a web crawler
2) Given the Job site URL, user web crawler to go to website
3) Given the Job keyword, enter it into the URL's search box
4) Do the search
5) Return the first result
6) Parse it into key needs for that position
7) Store it into a DB
8) Do this again for the first 10 and then 100 jobs
9) Distill all the key skills
10) Produce a web report for jobsite URL + job keyword
API of the price
If you wanted to go all out with it, you could even have posts auto-delete after a week if there haven't been any comments on them.