Django Backend Optimization & Bug Fixing

My application, primarily built with Django and React.js, is experiencing several backend performance issues, functional bugs, and potential security vulnerabilities. I need a seasoned backend developer proficient in Django, with a knack for debugging and optimizing performance, to take charge of fixing these issues.

Key Responsibilities:
- Identify and rectify functional bugs
- Enhance performance and eradicate performance issues
- Secure the application against vulnerabilities

Ideal Skills:
- Proficient in Django and React.js
- Experienced in backend development
- Strong debugging and performance optimization skills
- Knowledgeable in backend security measures