Service-oriented architecture organizes the system around business capabilities exposed as services. The following principles guide how ShopNexus draws and maintains its boundaries.

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Principles

Services depend on published contracts, never on another service’s database or internal types. A change inside one service must not force a change in another.
Each service owns one business capability end to end. Related behavior and data live together; unrelated concerns live elsewhere.
A service controls its own data, schema, and deployment lifecycle. It can be released without coordinating a lockstep deploy with its peers.
Interfaces are defined before implementation and treated as a stable, versioned promise to consumers.

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Why it matters

These principles trade some local simplicity for independent evolvability — the ability to change, scale, and deploy one capability without disturbing the rest of the platform.