Questions
Status
Email job queueEasyDesignDesignEasy30 minIn-app notificationsEasyDesignDesignEasy25 minKitchen order screens for a restaurant groupEasyDesignDesignEasy30 minNew listing alerts for saved rental searchesEasyDesignDesignEasy25 minSending orders to a print partnerEasyDesignDesignEasy25 minOrder-dispatch queueMediumDesignDoorDash styleDesignDoorDash styleMedium35 minMulti-channel notification platformMediumDesignDesignMedium40 minPresence system for team chatMediumDesignSalesforce styleDesignSalesforce styleMedium35 minDelayed job queueMediumDesignDesignMedium35 minActivity-digest aggregationMediumDesignDesignMedium40 min3-D Secure payment reconciliationMediumDesignStripe styleDesignStripe styleMedium40 minReal-time location sharingMediumDesignApple styleDesignApple styleMedium40 minLive 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 min