--- title: Inside the Events Rail: How Atlassian Delivers 10... description: Atlassian's webhooks-processor service (the 'events rail') delivers over 10 billion webhook events per month at ~6,000 events/second, serving Forge apps,... canonical: https://daily.dev/posts/inside-the-events-rail-how-atlassian-delivers-10-billion-webhooks-a-month-28sbia0pb twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Inside the Events Rail: How Atlassian Delivers 10 Billion Webhooks a Month | daily.dev og:description: Atlassian's webhooks-processor service (the 'events rail') delivers over 10 billion webhook events per month at ~6,000 events/second, serving Forge apps,... og:url: https://daily.dev/posts/inside-the-events-rail-how-atlassian-delivers-10-billion-webhooks-a-month-28sbia0pb og:image: https://api.daily.dev/og/posts/28sBIa0PB.png og:image:alt: Inside the Events Rail: How Atlassian Delivers 10 Billion Webhooks a Month 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. # Inside the Events Rail: How Atlassian Delivers 10 Billion Webhooks a Month **[Atlassian](https://daily.dev/sources/atlassian)** · 19 min read · 0 upvotes · 0 comments ## Summary Atlassian's webhooks-processor service (the 'events rail') delivers over 10 billion webhook events per month at ~6,000 events/second, serving Forge apps, Bitbucket repository hooks, audit-log endpoints, and workflow post functions across hundreds of thousands of customer sites. The architecture uses a two-stage pipeline — Event Matching and Event Delivery — separated by queues, allowing each stage to scale independently based on its bottleneck (CPU for matching, network for delivery). Multi-tenant fairness is achieved through four layered mechanisms: a negative-lookup cache for no-match events, queue isolation per pipeline to prevent head-of-line blocking, per-tenant rate limiting to protect overall capacity, and per-recipient concurrency limiting to handle slow responders. Reliability is maintained via idempotent delivery with stable identifiers, exponential backoff with jitter, dead-letter queues, circuit breakers for upstream dependencies, and application-layer backpressure. The platform is growing ~18% month-over-month and is designed to absorb AI agent traffic bursts and large Data Center-to-Cloud customer migrations without architectural changes. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Reliable webhook infrastructure](https://daily.dev/posts/reliable-webhook-infrastructure-fkgcnzbf0) · Product Hunt · 1 upvotes · 0 comments --- Tags: [#architecture](https://daily.dev/tags/architecture), [#distributed-systems](https://daily.dev/tags/distributed-systems), [#multi-tenancy](https://daily.dev/tags/multi-tenancy) [View this post on daily.dev](https://daily.dev/posts/inside-the-events-rail-how-atlassian-delivers-10-billion-webhooks-a-month-28sbia0pb) ```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":"Inside the Events Rail: How Atlassian Delivers 10 Billion Webhooks a Month","url":"https://daily.dev/posts/inside-the-events-rail-how-atlassian-delivers-10-billion-webhooks-a-month-28sbia0pb","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/inside-the-events-rail-how-atlassian-delivers-10-billion-webhooks-a-month-28sbia0pb"},"datePublished":"2026-07-29T01:27:24.283Z","dateModified":"2026-07-29T04:45:35.691Z","description":"Atlassian's webhooks-processor service (the 'events rail') delivers over 10 billion webhook events per month at ~6,000 events/second, serving Forge apps,...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/525f068e6d4433dc1ee3a5514a785faa?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/525f068e6d4433dc1ee3a5514a785faa?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Atlassian","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Atlassian","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/44750d8e66de4411bb477159b321bb43","url":"https://daily.dev/sources/atlassian"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/inside-the-events-rail-how-atlassian-delivers-10-billion-webhooks-a-month-28sbia0pb","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"architecture,distributed-systems,multi-tenancy","timeRequired":"PT19M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Atlassian","item":"https://daily.dev/sources/atlassian"},{"@type":"ListItem","position":3,"name":"Inside the Events Rail: How Atlassian Delivers 10 Billion Webhooks a Month"}]} ```