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Microservices
Service Decomposition
Service per Team
One team, one service — clear ownership, no shared responsibility chaos.
Intent & Description
Real-world Use Case
Payments Team owns the Payment Service. Only they can merge to its repo, deploy it, and change its API. Order Team wants new functionality → they file a request or PR to Payments Team. No shared ownership confusion.
Source
📌 TL;DR
One service, one team, full ownership. Clear lines = faster delivery. The org chart IS the architecture.
Advantages
- Crystal-clear ownership — no “whose bug is this?” ambiguity
- Team autonomy — no waiting for other teams to approve changes
- Naturally enforces service boundaries
- Clear on-call responsibility per service
Disadvantages
- Small teams can become bottlenecks for their service
- Cross-team API negotiation takes time
- Team reorganizations require service ownership transfers
- Single team as single point of failure for a service