Accessibility Enhancement for UX

I'm looking for an experienced professional to improve the accessibility of my website.

Key requirements include:
- Conducting a comprehensive accessibility audit
- Implementing WCAG 2.1 compliance
- Enhancing keyboard navigation
- Improving screen reader compatibility
- Providing documentation on changes made

Ideal skills and experience:
- Strong understanding of web accessibility standards
- Experience with accessibility testing tools
- Proficiency in HTML, CSS, and JavaScript
- Prior experience in UX design focused on accessibility

Please share relevant portfolios and case studies.