Urgent Sports Goods Website Fix

I need an experienced web developer to diagnose and fix issues on my sports goods website. The site is currently non-functional, and I need it up and running within a few days.

Requirements:
- Complete diagnosis and resolution of errors
- Ensure functionalities:
- Product listing and details
- Shopping cart and checkout
- User login and account management
- Quick turnaround is critical

Ideal Skills and Experience:
- Strong problem-solving skills
- Experience with custom-built websites (HTML/CSS/JS)
- Familiarity with e-commerce functionalities
- Ability to work under tight deadlines