David Riordan expanded retailer coverage in the alltheplaces/alltheplaces repository by developing end-to-end location data scraping spiders for multiple US brands. He implemented a range of data extraction techniques, including sitemap and AJAX-based gathering, JSON-LD parsing, and API-driven fetches, to collect detailed per-store information such as hours, contact details, and available services. Using Python and Scrapy, David enhanced the data model to support richer, more comprehensive location datasets and faster refresh cycles. His work focused on building robust, maintainable spiders that automate the aggregation of structured location data, demonstrating depth in API integration and web scraping methodologies.