Dukan - Multi Tenant SaaSbased E-commerce Platform▮

Core Tech Stack

Clean Architecture Foundation

Designed a strict layered architecture across three microservices — Domain, Application, Infrastructure, Host — ensuring dependencies flow inward and the domain remains framework-agnostic.

Multi-Tenant Isolation

Implemented shared-database multi-tenancy with EF Core global query filters, tenant interceptors for auto-stamping, and tenant resolution middleware — keeping each merchant's data isolated at the application level.

CQRS via MediatR

Separated commands and queries into distinct handlers with a FluentValidation pipeline behavior — keeping controllers thin as one-liners and centralizing cross-cutting concerns.

Event-Driven Communication

Wired Redis Streams for async cross-service events — order placement triggers notification dispatch through at-least-once delivery with consumer groups for load balancing.

Real-Time Notifications

Built a SignalR hub with Redis backplane for horizontal scaling — delivering in-app alerts, email digests, and WebSocket pushes to the frontend with a strategy-pattern dispatcher.

Media Processing Pipeline

Created a chunked upload protocol → MinIO storage → background SkiaSharp WebP conversion pipeline, generating original, display, and thumbnail variants asynchronously via Hangfire jobs.

Next.js 16 Storefront

Built a responsive frontend with App Router, TanStack Query for server state, and Tailwind v4 — covering merchant dashboards, customer storefronts, and admin panels.

Full Observability Stack

Instrumented the entire system with OpenTelemetry — shipping traces to Tempo, logs to Loki, metrics to Prometheus, all visualized in custom Grafana dashboards with alerting rules.

Testing Strategy

Unit tests with xUnit and FluentAssertions for backend handlers and dispatchers; Jest with React Testing Library for frontend components and hooks — ensuring critical paths are covered.