JavaScript and Java Backend Fixes

I need a skilled developer to resolve several issues on a JavaScript page and improve the Java backend.

JavaScript Page Issues:
- Loading errors
- Functionality bugs

Java Backend Issues:
- Not specified, but experience in troubleshooting necessary

Ideal Skills and Experience:
- Proficiency in Java and JavaScript
- Strong debugging skills
- Experience with various frameworks (since it's not a specific one)
- Experience with database connectivity, API integration, and server management

Please provide your portfolio and relevant experience.