Online store support on Beatrix

The online store is made on 1s-bitrix.
You need a web programmer to do a little work to maintain the health of the site (small improvements - no more than 20 hours per month).
The cost of support per month is 20 tr
Address: hobbyteka.ru

In addition to support tasks, there are a number of larger tasks that will be paid separately, according to the preliminary assessment of the work:
1) Registration through social services. Network
2) Adding Features Favorites.
3) Adding delivery via Russia mail
4) Adding delivery via PickPoint

The list of tasks will be updated from time to time.

Requirements for the performer:
Excellent knowledge of PHP, JS, CSS, HTML. Experience with Beatrix, understanding the workings of its modules, and the structure of the framework.
It will be a plus if they were developing the site on Bitrix.