Customization for Sponzy or Dizzy

I am looking for an experienced programmer to customize two existing templates - Sponzy and Dizzy - with custom features and functionalities. I need the job to be completed within one week so timeliness is key. The exact features and functionalities I need to be added are still under consideration, but with the right person I am confident they will be accommodated to my needs. An extensive portfolio of programming experience is required, as well as consistent communication during the entire project.