To work on the Wordpress site is looking for developer (regular cooperation)

Good day,
need a specialist on a regular basis for performance improvements of an existing website on wordpress.
The first phase of work to improve performance on Google PageSpeed.
The second stage is to raise the FID
First Input Delay (FID): measures interactivity. To provide a good user experience, pages should have a FID of less than 100 milliseconds.
Now the average 900ms.