Support and development of the corporate site crm-system

Need expert in PHP development, AJAX, ActionScript, JavaScript, Joomla!, VirtueMart, MySQL, SQL, jQuery for the support and development of projects (corporate website and CRM system). Periodic work on certain tasks (to add new functionality, calculators, correction of errors, etc.).

Approximate tasks for the near future:
1. To correct the existing calculators on the website (vp24.ru/printdocs). They take data from CRM and fields, the settlement amount took into account the cost of services.
2. There is a problem in the CPM, but the algorithm is not clear to anyone – contractors disappear from the database, paid their bills on the spot, climb bugs. The task is to find a bug and fixed))
3. The previous programmers did a sloppy unloading the new partners for a day in xml is also fixed

well, stuff like that, while errors and minor changes, while major calculators.