Magento2.3 speed optimization over remote connection

Hi All,

I need some one good in Magento2.3 speed optimization over remote connection. (i will check if you can fix some, then we can go for big work)

i need fix
- Avoid an excessive DOM size
- Serve static assets with an efficient cache policy

I'm looking after your speed optimization my
- Google Page Speed
- GTmetrix | Website Performance Testing and Monitoring

resolved most of the below issues :
- Eliminate render-blocking resources
- Remove unused CSS/JS
- JavaScript execution time
- Defer offscreen images
- Minify CSS/JavaScript
- Enable text compression
- Uses efficient cache policy on static assets
- Reduce the impact of third-party code
- And many other things.

with regards,