Hope you are doing well.
I have completed reading your job description and have concluded that you are looking for a Ruby on Rails developer to help build new features and tools for data visualisation and manipulation related website. I see myself as a good fit for this position.
I am well proficient in working with Web App development, enhancement, bugs fixing, maintainance, design and deploy. I love the process of writing clean code combined with thoughtful design to create user-friendly applications.
Please have a look on my Ruby On Rails work: