ShopNexus is an e-commerce platform built on a service-oriented architecture (SOA). The system is decomposed into independent services that own their data, communicate over well-defined contracts, and can be developed, deployed, and scaled independently.
This documentation covers the platform’s architecture, services, APIs, and operations. It is the developer-facing companion to the engineering report.

What you’ll find here

Architecture

SOA principles, service layers, communication patterns, Saga, CQRS, and DDD.

Services

The catalog of services, their responsibilities, and ownership boundaries.

API Reference

Contract-first API design and external integrations.

Operations

How services are packaged, deployed, and run.

Design goals

  • Loose coupling — services interact through contracts, not shared databases.
  • High cohesion — each service owns a single business capability.
  • Independent deployability — services ship on their own cadence.
  • Resilience — failures are isolated and handled with explicit strategies.