Work in a web project on a permanent basis (potasovka)

In the current project requires php programmist for work by the hour.

About the project:
- Developing a price aggregator
- Built on Zend Framework, Bootstrap, MySQL (Ubuntu)
- Because it is a price aggregator, the project operates with a large database, the queries which are continuously optimizing, tracking bottlenecks using a Profiler
- Manages the development of a senior programmer, which actually need an assistant
- The alleged involvement of from 5 to 20 hours per week

Basic requirements:
- experience framework-AMI (php and javascript)
- experience with large databases (MySQL)
- ability to periodically be available in the evening (19:00 - 24:00)

Would be an advantage (not necessary but desirable):
- coding experience
- Wordpress development experience (plugins, themes)