Questions
Status
Live order tracking and ETAMediumDesignDoorDash styleDesignDoorDash styleMedium40 minAlert routing and deduplicationMediumDesignDesignMedium35 minLog live tail streamingMediumDesignDesignMedium35 minMulti-tenant event fan-outMediumDesignSalesforce styleDesignSalesforce styleMedium40 minDirectory sync serviceMediumDesignMicrosoft styleDesignMicrosoft styleMedium40 minLive DVR and time-shiftMediumDesignComcast styleDesignComcast styleMedium40 minMusic streaming and offline downloadsMediumDesignSpotify styleDesignSpotify styleMedium40 minLive event chat at scaleMediumDesignAmazon styleDesignAmazon styleMedium45 minDelayed job schedulerMediumDesignStripe styleDesignStripe styleMedium40 minNotification batching systemMediumDesignDesignMedium40 minDesign reverse proxy connection poolingMediumDesignDesignMedium35 minWebhook receiver with out-of-order eventsMediumDesignStripe styleDesignStripe styleMedium35 minLive courier trackingMediumDesignDoorDash styleDesignDoorDash styleMedium45 minFootfall dwell analyticsMediumDesignDesignMedium45 minPoison message handlingMediumDesignDesignMedium30 minToken-authorized CDN media deliveryMediumDesignNetflix styleDesignNetflix styleMedium40 minMulti-channel notification orchestrationMediumDesignDoorDash styleDesignDoorDash styleMedium40 minIoT device pub-sub and commandsMediumDesignAmazon styleDesignAmazon styleMedium45 minSmall team chatMediumDesignDesignMedium35 minNotification sender with retryMediumDesignDesignMedium35 minWebhook deliveryMediumDesignStripe styleDesignStripe styleMedium30 minHigh-volume webhook deliveryMediumDesignStripe styleDesignStripe styleMedium40 minSupport ticket routing and SLAMediumDesignServiceNow styleDesignServiceNow styleMedium40 minReal-time personalization shelfMediumDesignNetflix styleDesignNetflix styleMedium45 minJob queue with worker poolMediumDesignDesignMedium40 minConnection pool coordinatorMediumDesignDesignMedium35 minServer-sent event fan-outMediumDesignDesignMedium40 minPresence status serviceMediumDesignMeta styleDesignMeta styleMedium40 minEvent sourcing append-only storeMediumDesignDesignMedium40 minEvent-streaming ledger backboneHardDesignStripe styleDesignStripe styleHard45 minHierarchical IoT pub/sub brokerHardDesignAmazon styleDesignAmazon styleHard45 minHome-feed delivery at scaleHardDesignMeta styleDesignMeta styleHard45 minHigh-throughput pub/sub systemHardDesignDatabricks styleDesignDatabricks styleHard45 minOutbound webhook deliveryHardDesignStripe styleDesignStripe styleHard45 minReal-time streaming aggregationHardDesignDatabricks styleDesignDatabricks styleHard50 minCache invalidation via CDCHardDesignShopify styleDesignShopify styleHard45 minMulti-tenant order secondary indexesHardDesignAmazon styleDesignAmazon styleHard45 minMulti-region price invalidationHardDesignAmazon styleDesignAmazon styleHard45 minAPI gateway cascading failuresHardDesignNetflix styleDesignNetflix styleHard40 minMulti-tenant job schedulingHardDesignDesignHard45 minEdge key-value storeHardDesignDesignHard50 minExactly-once payment eventsHardDesignStripe styleDesignStripe styleHard50 minAutomated anomaly detectionHardDesignDesignHard45 minMulti-backend telemetry pipelineHardDesignDesignHard45 minLive counter vs settlement reportHardDesignStripe styleDesignStripe styleHard50 minIoT latest-state lakehouseHardDesignDatabricks styleDesignDatabricks styleHard50 minVideo session windowingHardDesignNetflix styleDesignNetflix styleHard45 minChannel access at scaleHardDesignSalesforce styleDesignSalesforce styleHard40 minVideo transcoding pipelineHardDesignGoogle styleDesignGoogle styleHard50 minLow-latency live streamingHardDesignAmazon styleDesignAmazon styleHard50 min