Update and integrate 2 existing Drupal 9 modules based on Form API and Commerce

The work will include the following (but not only):
– Integrate/connect 2 separate modules (Estimator and Order),
– Modify/update the Forms, created with “Form API” (PHP, JS, CSS and twig files),
– Adjust the CSS for themes “Bootstrap Barrio 5.5.4 Sub-theme”, Olivero, Martis (?)
– Setup the ERRORs reporting

More detailed description:
https://docs.google.com/document/d/11afJcMwu_gA861H6uBE2_wAF3dg1DWAR/

I will provide a copy of the test database (with all necessary data and settings) and a list of required modules.
I expect the developer to have their own work environment (computer, internet access, software installed on their computer, etc) and enough skills to complete the tasks.
I would prefer the developer to work with a shared screen for faster start-ups and error prevention (at least to begin with).
A Russian-speaking developer is desirable (for communication reason), but not required.