senior.NET Core

How do you design a resilient message processing system in .NET Core?

Updated Apr 28, 2026

Short answer

Design a resilient message processing system in .NET Core using message queues, retry policies, idempotency, dead-letter queues, circuit breakers, and distributed monitoring.

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Deep explanation

A resilient message processing system ensures messages are processed reliably even during:

  • Service failures
  • Network outages
  • High traffic spikes
  • Duplicate deliveries
  • Partial system crashes

Common technologies include:

  • RabbitMQ
  • Apache Kafka
  • Microsoft Azure Service Bus
  • Amazon Web Services SQS

The goal is to achieve:

  • Reliability
  • Scalability
  • Fault tolerance
  • Observability

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1. Use Asynchronous Messaging

Instead of direct service-to-service communication:

Bad:

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API → Payment Service → Email Service

Use queues:…

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