UK Developer needed to help with Amazon System

We are a large Amazon seller and our in house developer has built a web system with a series of tools that helps us run our business effectively. We are looking to add a lot more features to this system and our developer now needs assistance to get everything completed that we want to build. You would work directly with our developer and he would give a series of different jobs that would need doing.

This will be an ongoing position and we are only accepting applications from the UK as that is where we are based and we want someone in the same timezone.

Testing all code you have built is vital. It will be up to you to test to make sure whatever you have built is free from bugs before making anything live.

Need experience in:
PHP (Codeigniter framework)
MySql
jQuery
CSS (Bootstrap)