Ruby on rails developer

We are currently looking for a freelancer that is able to help us with several small developments. Our social network is built on Ruby-on-rails and MySQL. We need several small improvements in the short term and a complete new software platform in the long term. We will initially start with a few small changes such as making the social network more dynamic (use of jquery). This position is a long term engagement for the right candidate since we are very interested in building a trustable long term collaboration. When you place your bid please explain to me why you are the right candidate and tell me about your skills and experience.