Next.js + Blockchain Website Optimization

I'm looking for an experienced developer to optimize my existing Next.js website. The main focus areas are performance and user experience.

Key tasks include:
- Enhancing site speed and responsiveness
- Improving navigation and layout for a better user experience
- Addressing any other issues that may hinder performance

Ideal skills and experience:
- Strong expertise in Next.js
- Proven track record in website performance optimization
- Solid understanding of user experience principles
- Familiarity with performance metrics like Core Web Vitals

Please provide examples of similar work done and your approach to optimization.