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DL-056 · Case study

Cross-border API architecture for an Amazon and Walmart US seller

An Argentine brand selling to American customers needed to restructure the systems connecting its US marketplaces and fulfilment partners.

Client
Name withheld
Location
Argentina
Industry
Cross-border consumer goods
Capabilities
01Audit02Stabilize
01

Challenge

  • Marketplace orders, US warehouse inventory and internal procurement data did not share a consistent state.
  • Inventory synchronization failures caused repeated manual interventions.
02

Environment

  • Amazon US, Walmart US and Shopify.
  • US-based 3PL, internal purchasing software and regional finance operations.
03

Intervention

  • Audited current marketplace integrations and warehouse synchronization paths.
  • Defined inventory ownership, order state transitions and cancellation handling.
  • Designed event-driven processing with reconciliation jobs, alerting and recovery procedures.
04

Outcome

  • A clearer integration architecture spanning US sales channels and cross-border operations.
  • A stabilization plan addressing inventory inconsistencies and integration failure recovery.
Amazon US, Walmart US and Shopify linked to a shared inventory service and US fulfilment network.AMAZON / WALMARTUS marketplacesSHOPIFYStorefrontINVENTORY SERVICEShared stateEVENTSReconciliationUS 3PLFulfilment
  1. 01AMAZON / WALMARTUS marketplacesSHOPIFYStorefront
  2. 02SHOPIFYStorefrontINVENTORY SERVICEShared state
  3. 03INVENTORY SERVICEShared stateEVENTSReconciliation
  4. 04EVENTSReconciliationUS 3PLFulfilment
Fig. 01Cross-border commerce architectureAmazon US, Walmart US and Shopify linked to a shared inventory service and US fulfilment network.Scale NTS

Stack and services.

Stack01

  • Shopify

Services used02

Tell us what has to work.

A senior engineer reads every brief. Describe the system, what it runs on today and what happens when it fails.

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