Copywriter for Teeth Whitening NIche

We require someone that is highly experienced in copywriting that converts prospects into taking action. We would be mainly focusing on the Teeth Whitening Niche. Hence we need someone that will be able to do the following

1) Research this specific niche to identify the demographics and understand the pain point/problems they faced
2) Embed this research into writing a compelling sales copy that will resolve their pain/problems with the products we are advertising.
3) We are really keen on someone who has proven track record of writing copy that converts highly. We would be checking this during the interview process.
4) We are flexible on the pay depending on skill level and experience as we want only the best.