I need a Web Scraper

General information for the business: We are a non-profit looking to develop supports to help people adjust to the Freelance economy. The first step is getting the data for analysis.This what we need your help for. Description of requirements/functionality: We would like you to build a web scraper to grab data from all job postings on sites such as: Freelancer, Upwork, Fiveer, Peopleperhour, Elance, Guru, etc. The type of information we need from these sites are by job title: the job count, hourly vs project based, budget/wage, qualifications, skills, website-provided certifications, typical applicant count, etc. Ideally, we would walk away with a program that we could run months down the line to compare the data at different times. OS requirements: Windows Extra notes: