We need a proofreader with an excellent eye for detecting spelling errors/grammar and other errors. I have lots of articles and I suggest a fees of 2$ for proofreading 7000 words. It works out to 4$-6$ per hour depending upon your speed.
All my writers are professional writrs so the chances of errors are minimal. I would also like my proofreader to take responsibility of suggesting which writer to let go in case his quality is poor as I believe in keeping a small group of quality writers whose work needs minimum proofreading.
I am not here to burden you with low quality work and expect you to turn it into a masterpiece. I only expect you to read my articles and correct any typo/spelling/grammar mistake made inadvertantlly by writer. Those writers who consistently make errors will be removed on basis of your recommendation.
So I would like a proofreader who is native english speaker with masters in english and biology who can proofread health articles as well and is aware of medical terms and their correct usage.