Website tester required

Require an experienced web developer/tester (preferably PHP) to user test an e-commerce website platform that we are developing. The tester will be required to test the backend administration section of the website. At this stage and will be required to:- 1) complete a series of tasks detailed by us 2) spend a further period of time user testing the site in a manner that they see fit. Feedback will need to be well documented including: - screenshots, - specific URLs, - detailed descriptions of problems etc. The tester should identify both physical problems that generate errors as well as any usability issues that they may encounter (even if the latter does not stop the site working). Please respond with:- - experience - availability It is anticpated that we will require a second (and possibly a 3rd) phase of testing in the future. Regards alex