Urgently Need an experienced English writer for on going projects

I am looking for a writer who has all the knowledge of SEO and full command over English. Need a writer who can create exciting titles and contents for the US audience on given topic. Must be a native English Writer. No poor language and grammatical errors will be allowed. Need to create 100% original content. Need to have good knowledge of editing and proofreading of their own and other's work if needed. Should be able to write 2/3 500 words article/day. The rate is $2/500 words for the candidate who proves his/her command over US English. Only apply if you have the experience, quality, and above-mentioned skills. You must be ready to start asap and also be ready to write a test article. Only apply if you are OK with the rate and conditions. No time waster please. The rate is non-negotiable.