Need Technical Content Writer.

I need a technical content writer to write content for our software product description. Content should be properly SEO optimized with proper keyword density. This would be a long term relationship if satisfied with your initial work. The pay is fixed with 0.30 USD per 100 words, 1.5 USD per 500 words and the articles would be varied from 300-500 words. Content should be in US/UK based. You have to send your sample work, and you would be given an article to test. You need to write content on our software product details, working, features etc. We have 5+ different software products topic to write content. Content may be News Article, Marketing Content, How To or Instructional, Opinion or Editorial, Technical Document, Blog or Web Content for our software products. The target audiences are our website visitors. Content must be original, we will check through copyscape.