Problem

Saudi B2B merchants deal with fragmented procurement—onboarding, credit checks, VAT rules, catalog updates, payments, and vendor coordination happen across disconnected systems. A unified, scalable commerce engine was required to support multi-vendor orders, KSA VAT compliance, mobile usage, and integrations with local partners.

Solution Overview

Designed a distributed, service-oriented B2B marketplace with mobile + web clients, centralized product configuration, vendor management, KSA VAT handling, credit validation, and checkout via multiple payment providers.

Architecture Snapshot

Layered Architecture

• Core Framework: shared logging, API host, security rules.

• DB Layer: Drupal abstraction enabling SQL/NoSQL flexibility; S3 for assets.

• Backend Services: profile, catalog, pricing, VAT, checkout, CRM sync, credit scoring, notifications.

• Application Framework: permissions, localization (Arabic/English), offline mode.

• Application Layer: native mobile apps + desktop console.

Distributed Backend Module Design

• Fail-isolated components: catalog, payments, VAT, CRM sync, credit scoring.

• If Apple Pay fails, checkout automatically falls back to other gateways.

• CRM (Pipedrive) and credit scoring (SalesBuzz) integrated via token-based APIs.

Gateway & Security

• Central gateway for token validation, routing, quotas, and signature checks.

• Role-based access to admin, merchant, and operational APIs.

• Full HTTPS + audit logs for compliance.

Commerce Capabilities

• KSA VAT engine with vendor/product overrides.

• Arabic/English localization across mobile and web.

• Multi-vendor cart + order orchestration.

• PWA caching for low-connectivity regions.

• High-SKU catalogs supported via CDN + search optimization.