--- title: Adventures at HyperScale! - Stefán Jökull Sigurðarson -... description: Have I Been Pwned now handles 17 billion monthly requests across 15+ billion breached accounts with a three-person team. The service evolved from Azure Tables... canonical: https://daily.dev/posts/adventures-at-hyperscale---stef-n-j-kull-sigur-arson---ndc-copenhagen-2025-dqmdg6cpo twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Adventures at HyperScale! - Stefán Jökull Sigurðarson - NDC Copenhagen 2025 | daily.dev og:description: Have I Been Pwned now handles 17 billion monthly requests across 15+ billion breached accounts with a three-person team. The service evolved from Azure Tables... og:url: https://daily.dev/posts/adventures-at-hyperscale---stef-n-j-kull-sigur-arson---ndc-copenhagen-2025-dqmdg6cpo og:image: https://api.daily.dev/og/posts/dQMdG6cpo.png og:image:alt: Adventures at HyperScale! - Stefán Jökull Sigurðarson - NDC Copenhagen 2025 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Adventures at HyperScale! - Stefán Jökull Sigurðarson - NDC Copenhagen 2025 **[NDC Conferences](https://daily.dev/sources/ndc)** · 53 min read · 0 upvotes · 0 comments ## Summary Have I Been Pwned now handles 17 billion monthly requests across 15+ billion breached accounts with a three-person team. The service evolved from Azure Tables to Azure SQL Hyperscale, implementing Cloudflare CDN with cache reserve for 99.9999% cache hit rates, custom autoscaling to work around Azure's memory-based billing quirks, and edge processing with Workers to reduce latency to under 50ms globally. Key lessons include the importance of observability, proactive monitoring over reactive dashboards, understanding database parallelism settings (max DOP), and how performance improvements can expose hidden bottlenecks. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [How AI-Powered Attacks Led Salesforce to Reinvent Hyperscale DDoS Defense](https://daily.dev/posts/how-ai-powered-attacks-led-salesforce-to-reinvent-hyperscale-ddos-defense-t1pdvztm6) · Salesforce Engineering · 1 upvotes · 0 comments --- Tags: [#azure](https://daily.dev/tags/azure), [#microsoft-sql-server](https://daily.dev/tags/microsoft-sql-server), [#cloudflare](https://daily.dev/tags/cloudflare) [View this post on daily.dev](https://daily.dev/posts/adventures-at-hyperscale---stef-n-j-kull-sigur-arson---ndc-copenhagen-2025-dqmdg6cpo) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Adventures at HyperScale! - Stefán Jökull Sigurðarson - NDC Copenhagen 2025","url":"https://daily.dev/posts/adventures-at-hyperscale---stef-n-j-kull-sigur-arson---ndc-copenhagen-2025-dqmdg6cpo","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/adventures-at-hyperscale---stef-n-j-kull-sigur-arson---ndc-copenhagen-2025-dqmdg6cpo"},"datePublished":"2026-01-15T05:51:03.224Z","dateModified":"2026-01-15T05:51:29.714Z","description":"Have I Been Pwned now handles 17 billion monthly requests across 15+ billion breached accounts with a three-person team. 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