Hello,
I have reviewed your requirements. You need a PHP expert to speed up a website, please share existing website link.
I will do deliver you desired solution as you want.
MY skills:
PHP, WordPress, Open-kart, Codeignitor, Woo-commerce, ASP.NET, MVC, C#, MSSQL, MYSQL, Database Programming, Bootstrap, Jquery, Front-end & Graphic designing, SEO.etc.
I request you to initiate PMB so that we can discuss your project in depth.
Regards
Ravi