HTML/CSS/JS/Ajax/JSON/AdminLTE Front End UX Design and Support

I have a project building and maintaining an existing application in HTML/CSS/JS (Ajax&JSON) using the AdminLTE templates. I need help with managing bugs and designing new features. The entire site is executed using JS Ajax with backend APIs. This project is only for maintaining the HTML/JS of the site. NOTE: This is for the UX only NOT the API design and development.