Hello!
Why am I the best candidate for your project?
That's because I have been doing this kind of stuff for the past 8 years!
I'm preparing to give an exam in the USA (SAT). For that, I have to do LOTS of proofreading. Not only that, I have worked very hard to upgrade my English skills. (Forex. Taking specialized tutions, watching all my online content in English, participating in tests, etc.)
So, unless you're hiring highly paid professional proofreaders, I'm the one who has the most experience proofreading.
P.S. I'm a programmer, so I'm used to quick typing, reading, and finding errors.