Parse web pages for specific string contents

I have a list with approx 20.-50.000 URLs. These URLs have a totally different format and i need a parser to identify strings within the websites. The websites are listed job positions found via a specific search on [login to view URL] The goal is to parse the job positions to get some information Examples to do: -identify a e-mail on the webpage -existing DB with 40.0000 short strings. All of them must be checked if they are in the text of the website. Experience with such numbers needed, also performance-wise (probably best to download/cache the webpages) Not needed: Analyzing the structure or to find certain fields is NOT NEEDED. only to find strings or specific string/number combination anywhere on the webpage. Freelancer must be experienced with parsing/parsing of different web formats/regular expressions/string operations/semantic search is a plus Beside 1:1 string search it is an absolute bonus to bring some ideas of semantic ways / hacks to identify strings that are similar to the existing ones. e.g. known string in the DB is "Human Ressources", then ideally it is also identified with "human resource". If the freelancer is good in this i am happy to pay a bonus or create a longer cooperation. Note: access to the parser or handover of the script/tool must be given because the parser is needed on a regular basis. Also you might be interested in the other job - the creation of the URL list: https://www.freelancer.com/jobs/Data-Entry/Crawl-Indeed-create-lists-job/ I'm happy if somebody can take over both jobs; to get experts i splitted crawling and parsing into two jobs.