I believe that I am exactly the person you are looking for. I am a seasoned web developer with 20+ years experience that has worked with many high profile clients. I have previously partnered with design companies in an identical manner to what you are looking for.
I am expert in HTML, JavaScript, CSS, PHP, & Python, in addition to a host of less well known languages. I have developed for every major CMS, but have been focusing on WordPress in recent years as I find it best suited to my clients needs & much faster to develop for.
I know Photoshop inside & out, and have done a fair amount of light graphic design, but would not consider myself a "proper graphic designer". I am instead fundamentally a coder & tech person.
I usually partner with a designer & transform their PSD mockup into a pixel-perfect WP theme & take over from there. At that point, I am completely comfortable modifying the existing design as requested.
I require little direction, reply to communication in a timely manner, & am very easy to work with. I would very much like to speak with you & will make myself available at your request.
There are some examples of my work in the portfolio on my bio. The themes for each project were built by me.
I think you would find me a perfect fit for you needs, & that this would become apparent after a brief discussion. Please let me know when we can talk & I will make myself available.
All the best,
Mark Kerr
416-323-1059