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# Marketplace architecture

# Marketplace architecture

Delivery

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Architects the multi-tenant platform through which products are packaged, distributed and installed — a central account governing per-customer accounts, a registry of components and releases, and the four ecosystem products underneath it: domain routing, account management, the product deployer and the tenant-side reconciler.
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- **Used when**
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— When a product needs to be distributed to many isolated tenants, or when one of the four ecosystem products is being built or changed.
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- **Loads first**
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- The marketplace skill and the skill for each ecosystem product.
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- The shared engineering guidelines.
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- **Returns**
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- The tenancy model, with any deviation called out.
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- The control-plane and data-plane boundary — what lives centrally, what lives in each tenant.
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- The component artifact contract, its versioning scheme and its immutability rules.
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- The registry design and its access patterns.
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- The interface — its operations, their schemas, the authorisation model and the idempotency strategy.
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- The cross-account deployment mechanism, with the rationale for the choice.
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- The bootstrap plan and the fixed order the ecosystem products come up in.
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- A verification plan that registers, releases, subscribes, rolls back and unsubscribes against a throwaway tenant.
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## Others in Delivery

- Analytics instrumentation
- Application scaffolding
- Design implementation
- Design testing
- Interface triage
- Sharing portals