Tiago Marques contributed to the viduni94/kibana repository by focusing on accessibility and UI quality improvements over a two-month period. He enhanced the BetaBadge component by adding ARIA attributes and descriptive text, ensuring screen readers accurately announce Beta status in line with WCAG standards. Using React, TypeScript, and CSS, Tiago also addressed a UI bug by enabling word wrapping in the Kubernetes survey toast, which improved readability and consistency across devices. His work demonstrated a methodical approach to accessibility and responsive design, collaborating with design and QA to validate changes and laying the foundation for broader accessibility initiatives within the project.