Finishing the site on Bitrix

Hello, there! The services of a specialist on Bitrix sites are required. We need to rework the Bitrix site.
There are a number of tasks that need to be solved.

The following are some of the tasks:
Reduce server response
- Set up caching of static files on the server
Optimize images and content on the server
Removing HTML code from the code is unnecessary and possible errors. Clearing the code.
Correcting JS and CSS files in the head section
- Reducing the load of time tables
- Change of format of display of cards of goods in issuance
- Filterization of products, adding a filter to the search
Adjustment of the search for the mobile version
- Adjustment of component templates
- Set up the review section and their moderation section
- Removal of duplicate pages, links

Requirements:
Knowledge of bitrix, ajax, php, css, htlm
Experience with VDS (CentOS) and databases (MySql, MariaDB)
- Skills of layout

The exact budget is negotiated at the meeting, depending on the number of tasks and the time of their implementation.