Revamp Design Configurator

I'm looking for an experienced developer to update our 15-year-old live design configurator. The goal is to enhance its functionality and performance, specifically focusing on updating the product customization configuration options.

Requirements:
- Update and improve existing functionality
- Enhance performance for a smoother user experience
- Overhaul configuration options, particularly in product customization

Ideal Skills and Experience:
- Strong background in UI/UX design
- Proven experience in improving legacy systems
- Expertise in product customization tools
- Familiarity with performance optimization techniques