Controller logic modulation consultant

We are in process of differentiating our operations and business code in controller level in order to achieve better code reusability. We are using Codeigniter framework for our web application. We need someone who can help us accomplish this task in a proper manner using the best coding practices. Qualified developers need to have extensive skills in MVC frameworks, php, JSON, API development. The work is flexible. It's depending on your skill set and availability.