Refinement of site ongoing support

Refinement of site ongoing support.
Looking for team back-end developer.
Necessary to make a number of modifications on the already existing website. Work affect both back-end and front-end (as a plus when choosing a contractor). Site was created on samopisnom framework (PHP, MySQL, jQuery, AJAX).

Project structure:
• albertparty.ru – custom part
• cp.albertparty.ru control panel for coordinators
• albertparty.ru/genipanel – admin
Looking man that will not only perform the designated work but will remain on supporting our site, and additional modifications for a fixed fee or hourly.
Description of the work and an accompanying document from the previous developers attached.