Article writer Urgently needed for long term basis

Article writer for long term We are looking for native English speaking writers for writing articles on various topics for our clients. We are looking for good writer who is looking for long term work. 1) Each article should be on approx. 500 words, No spelling or grammar mistakes, or it will be rejected. 2) All articles must be at least 80% unique; they will be reviewed through Copyscape and Dupecop for plagiarism. 3) You must understand keyword density and SEO. Articles must be optimized for the given keyword phrase with a minimum of 2% keyword density but preferably 3% to 5%. 4) I will supply you with keywords for the article. You will need to use the keywords I provide in a normal and conversational way throughout the article. The keyword will need to be in the article title, first sentence and used another 5-8 times throughout the rest of the article. 5) Articles should be completed within time-frame of 7 days 6) Articles will be first reviewed by us Place your bid per article, payment will be released after completion of minimum 5 articles. I can pay directly through paypal. You must provide me with examples of your previous works.