WordPress Site Redevelopment on Avada

I need my existing WordPress website (built on the Avada theme) redeveloped due to poor initial work. No design changes are needed, just a proper touch-up. The current site has many security concerns and design issues.

Key Issues to Address:
- Outdated plugins or themes
- Poor coding practices
- Weak user authentication mechanisms
- Unnecessary use of free plugins for small tasks

Functionality Improvements Needed:
- Loading speed optimization
- Fixing responsive design issues
- Enhancing plugin performance
- Strengthening security

Ideal Skills and Experience:
- Strong expertise in WordPress and Avada theme
- Proven track record in addressing security vulnerabilities
- Proficient in optimizing website performance
- Experience in responsive design and coding best practices
- Ability to work within a set budget and deliver on time

Please provide a portfolio showcasing similar projects.