Real WordPress Dev For Website Speed Optimization Needed

I am seeking WordPress Pro Developer who is an expert in WordPress Speed Optimization. I want to learn how to achieve 90+ Google Page Speed Insights & GTmetrix Scores. -Teach Me 90+ Scores Optimization Trick for Achieving in Google Page Speed Insights in both Mobile & Desktop & GTmetrix A+ Scores Trick. - Need to be done each site within 6 hours. - Work on Teamviewer or Anydesk -Speed should be permanent. -No extra paid plugins or services. Please note that I am only seeking professional WordPress Speed Optimizers who have coding skills not only by simple plugins. Yes, but you could use plugins too. I need only an expert in WordPress speed optimization who can teach me real tips and tricks. And, I will check those tricks and ask you to work on few more sites approx 4-5 sites so i can learn i easily also work in front of you so you can check if i am doing right. Please tell me three minus one in the top of the bid. I am really eager to work with you. Thanks, Bilal