HubSpot: Task queueing system built on top of Amazon SQS
HubSpot discusses how they built a task queueing system built on top of Amazon SQS, for delivering retries, high availability, dead-letter management, message tracing, and more. HubSpot leverages this task queueing to support 450+ micro services, delivering features ranging from email delivery, to automated marketing workflows, or even automatic impaired host replacements.

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