hamlet!
Dear friend,
I am a Magento developer from Vietnam. I have been working with Magento for more than 5 years. I can write extension, write theme and customize Magento as your request.
I can work with Magento 1, Magento 2, linux servers, AWS, cache system .. I can optimize magento site and servers to get fastest speed (average loading time will be from 1 - 4 seconds).
On Gtmetrix they may suggest you to optimize frontend caching, reduce request, compress images.... but we still have to optimize Magento source code, functions and server configurations to get faster speed.
I will be more than happy to do this job for you and build relationship.
Thanks a lot,
Jimmy