Hi,
As I viewed your project description, I can fix the child theme issue as I'm having on hands experience in it. It will not take much time to execute the results for you.
Holding an experience of 7+ years in UX designing though, I have work experience in HTML5, CSS3, Bootstrap, Material Design, Js, jQuery, Angular Js WordPress, Shopify, OpenCart development, etc.
I look forward to getting your kind response. Thank you for your valuable time.
Thanks & Best Regards
Amit J.