Finalization of the site on 1C-Bitrix

Hello!
It is necessary to fix a number of bugs on the site 1c-Bitrix Site Management, online store

You need to configure the integration of the exchange with 1C
Fix the bug, in some orders the cost of delivery disappears

Finalize the integration with the third-party service of the loyalty program for rest api
We need a confident middle-senior 1C-Bitrix developer.

Then you can work on the desk time, there are still tasks.