Develop a Web Spider/Crawler/Scrapper for SEO purposes

Develop a Web Spider, Crawler or Scrapper We want to find a coder that can develop for us a robust Web Spider that crawls a given website and extract data from it for SEO purposes. On top of that we also want to develop something like [login to view URL] We need a Worker Threads that is constantly running, with jobs being executed separetly (this is a must!). All results must be saved on a Database. We only accept bids from coders that can prove their experience on this type of projects and also are able to explain/discuss with us the architecture of the web spider. If you have skills for this project, please bid. If not, don't waste your and our time Regards