Worked on the YesWiki/yeswiki repository with a focus on backend development and SEO optimization using PHP. Addressed a specific SEO issue by implementing a bug fix that applies a 'noindex, nofollow' meta robots tag to not-found and non-show pages, preventing search engines from indexing invalid or irrelevant content. Refactored the MetarobotsAction service retrieval to utilize a class constant, improving code consistency and maintainability. This targeted change enhanced search engine crawl efficiency and aligned with best practices for web content management. The work demonstrated attention to both technical detail and long-term maintainability, contributing to the overall quality of the codebase.