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Web Application • Mobile • Commerce

Global Marketplace

A scalable marketplace architecture built to support listings, organizations, subscriptions and international expansion.

Industry
Marketplace
Services
E-commerceWeb ApplicationsCloud Infrastructure

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Challenge

The problem

The existing platform was built for a single market and a single seller type. Adding organisations, subscription tiers or a second currency each required changes across the codebase, which made expansion slow and risky.

Goals

  • Support multiple organisations with their own users and permissions
  • Handle subscriptions, renewals and billing states reliably
  • Operate across currencies and regions
  • Make adding a market a configuration task rather than a development project
Approach

How we tackled it

  • Multi-tenant model

    Organisations became a first-class concept in the data model rather than a flag layered onto user accounts.

  • Billing as a state machine

    Subscription states and transitions were modelled explicitly, so edge cases like failed renewals behave predictably.

  • Localisation architecture

    Currency, tax and content locale were separated so a market could be added without touching business logic.

  • Infrastructure for growth

    Deployment, caching and observability were designed for regional traffic rather than assumed single-region use.

Design

Design process

Three distinct audiences — buyers, sellers and administrators — needed genuinely different interfaces on shared data. A shared component library kept them consistent without forcing them into the same layout.

Technology

  • Next.js
  • Node.js
  • PostgreSQL
  • Redis
  • Payment provider integration
  • AWS

Security considerations

  • Strict tenant isolation so no organisation can reach another's data
  • Payment flows architected so card data is handled by the provider
  • Administrative interface protection and privilege separation
  • Object-level authorization testing across all three user types
Outcome

What we delivered

A marketplace where organisations, subscriptions and regions are modelled as first-class concepts, so growth is a configuration change rather than an engineering project.

Results

  • New markets added through configuration rather than code changes
  • Subscription edge cases handled by an explicit state model
  • Tenant isolation verified through access-control testing
  • Shared component library across buyer, seller and admin interfaces

Results describe delivered capability. We publish measured figures only where the client has supplied the data and approved its use.

Services used on this project

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