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This 40-minute conference talk from BSidesCharm 2025 explores the challenges and solutions in maintaining and scaling a modern XDR (Extended Detection and Response) product. Dive into a real-world case study that reveals the complexities of delivering security products to millions of users, including building and deployment strategies, performance issue mitigation, and false positive reduction. Learn how effective cross-functional coordination between researchers, engineers, and stakeholders is essential for successful security system implementation. Presented by Jessica David, Principal Data Engineer on the Security Intelligence Team at Elastic, who brings valuable insights from her background in software engineering and data warehousing, particularly in building data pipelines and services for processing threat intelligence.