We have a website that is currently running. It is using Silex, a micro-framework based on Symfony2.
We have some modifications to do:
First we need change some html / css (add or modify about a dozen elements).
Second, there is currently a payment API on the website. We would like to modify the behavior so the all the payment process is done into a lightbox instead of multiple page loadings.
So it is essentially HTML / CSS and jQuery development, although you should really know about Silex or at least Symfony2.