Hello,
I am an experienced website speed optimizer/developer, also doing the same jobs in other freelancers sites.
I will investigate, diagnose and fix the speed related problem with the your site.
I will do manually apply internal optimizations to speed up your site using; server side changes, identify the files which taking long time to execute, Database Table/sql optimize,remove unused CSS / JS, compress (images, CSS, JS), gzip, Leverage browser caching, expire headers and remove some items under render blocking javaScript,fix the code files which taking long time. So your site's homepage speed will improved in higher level.
Please let me know what speed measuring tool you are using for your site?
Please send me site FTP and admin login/pass so I could fix speed related issues and Hope you will agree to accept my changes to speed up your site.
Thanks for reading.