Alejo developed an HTTP No-Cache Headers Enforcement feature for the terra-hq/sei-wp-theme repository, focusing on backend and WordPress development using PHP. He introduced a dedicated no_cache_headers function within cleanHouse.php and integrated it with the send_headers hook to ensure that all HTTP responses include no-cache headers. This approach prevents both client-side and proxy caching, directly addressing privacy and content freshness requirements for users. Alejo’s work involved verifying the integration across the theme to guarantee consistent behavior. The feature was delivered as a single, well-scoped enhancement, demonstrating a focused and methodical approach to solving a specific engineering challenge.