Opencart Theme Customization Expert Needed

I'm looking for an experienced Opencart developer to customize a theme based on my reference. The customization should include:
- Layout and structure adjustments
- Color scheme and fonts modification
- Custom graphics and images creation

Ideal skills and experience:
- Proficiency in Opencart and theme customization
- Strong design skills for graphics and layout
- Experience with color schemes and typography

Please provide examples of previous work.