4 Designing new features

This chapter covers

  • Scoping microservices based on business capabilities and use cases
  • When to scope microservices to reflect technical capabilities
  • Making design choices when service boundaries are unclear
  • Scoping effectively when multiple teams own microservices

Designing a new feature in a microservice application requires careful and well-reasoned scoping of microservices. You need to decide when to build new services or extend existing services, where boundaries lie between those services, and how those services should collaborate.

Well-designed services have three key characteristics: they’re responsible for a single capability, independently deployable, and replaceable. If your microservices have the wrong ...

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