Integration with Bitrix ( 1C-Bitrix )

Hello. At the moment, there are several tasks:
1. Integration of 1C-bitrix with iiko (add a few points)
2. Integration of 1C-bitrix with PremiumBonus
3. Fix bugs on the site, for example:
-search gives deactivated categories in the issue
-speed up the work of the site, make some webpack, etc.
-make a submission form with a file on the landing page

I need an adequate person, and most importantly a professional in my field.

I look forward to your feedback.