Website Developer for Agency based in Germany

We are an up and coming social media marketing agency based in Koblenz, Germany. We are currently in the process of setting up our business. For that matter we need a website developer. We already have a detailled vision of what our website should look like, we just need someone to execute those ideas.
As we are a marketing agency we are interested in establishing a long-term relationship with the website developer we chose, as we would like to use that same developer for our clients websites.
Before we decide to work with you, we would like to have a short skype call. After that we will thoroughly discuss our vision of the website with you.
Please send us a portfolio of websites you have developed in the past.