Support for an online store on Bitrix

We are looking for a person for long-term cooperation on the support of a small online store on Bitrix.
Tasks:
1) Solve day-to-day issues such as "aaah, the slider isn't working!1111" and "aaaaah, everything is broken, it broke by itself, we didn't do anything!!!111"
2) Extend the functionality of the site, for example setting up a product filter, CRM integration, automating some order-processing operations.
There is currently at least 10–15 hours of work, and more as new ideas come up.
Requirements:
A Bitrix store in your portfolio
Working conditions:
We are ready to consider whichever options suit you, for example a monthly fee for solving small problems and hourly pay for larger changes, or hourly pay only. We are also ready to discuss payment methods, but preferably officially through a sole proprietorship.
We would like to know about you:
1) A link to your portfolio
2) Your experience with Bitrix
3) The cooperation terms that suit you and your hourly rate
4) How you can accept payment
I will message the candidates I like privately and we will discuss everything in more detail.