Transfer and refinement of the payment page on Beatrix

There is a working page of payment with the integration of 2 services on the old site, it is on Bitrix. And there is a new site in the new design on the same Bitrix. Have to:
1. Delve into TK to refine this functionality.
2. First transferred the current functionality to the new design of the new site.
Develop functionality in accordance with TK.

Ill send all the details to the chosen performer. We need a strong backer with confirmed skills and a willingness to work at the weekend, financially compensated.