Hello,
I specialize in extreme WordPress website speed and performance optimization, and usually charge clients in hundreds of dollars for the level of meticulous tweaking I do to achieve 100/100 in all major speed tests. You can see the results by running speed tests on the sites in my portfolio (other than KhaasGallery, which hasn't been optimized).
However, since I'm just trying to getting started here on Freelancer, I'm willing to optimize your site at my bid price. Please note that in this budget, I will be limited to certain constraints, such as your web host, possible lack of a CDN etc. due to which the results might not be 100/100, but I'll guarantee to optimize it to the maximum extent possible under your current hosting setup. If you don't mind investing more money to get a highly optimized hosting setup as well as a CDN, I can make my recommendations and help configure that as well, but that could go beyond the scope and budget of your project.
Please don't let the lack of reviews on my Freelancer profile discourage you, as I'm just getting started on this platform. If you have any questions, do get in touch and I'll address any concerns you might have.
Looking forward to hearing from you.