Web Application Security Enhancement

I'm looking for a Java developer who's experienced with Spring framework to help me with a critical issue. The role-based security for the endpoints in my web application needs to be fixed.

Key tasks:
- Review the current role-based security implementation.
- Identify any vulnerabilities or misconfigurations.
- Fix any issues, and enhance the security measures.

Ideal skills and experience for the job:
- Strong Java programming skills.
- Proficient in Spring framework.
- Expertise in web application security.

Your main goal will be to ensure the endpoints in the application are properly secured and only accessible to users with the correct roles.