Architecture

Multi-Tenant Clean Architecture Backend

Backend Architect

This project is a strong example of backend architecture work where maintainability, auditability, and extensibility matter.

Overview

This project was a multi-tenant backend platform for decarbonization and emissions-governance workflows. The system handled companies, facilities, emission taxonomies, reporting structures, localization, tagging, files, dynamic grids, corporate actions, and AI-assisted sustainability workflows.

My role was backend architect. I focused on building a maintainable .NET backend with clean boundaries, traceable data changes, and extensible business workflows.

What The Platform Needed

The platform needed to support complex, tenant-aware business operations:

The main challenge was designing a backend that could absorb changing business rules without turning the application layer into a collection of special cases.

Multi-tenant company and facility management
Emission categories, sources, settings, entries, and reporting standards
Dynamic grids and metadata-driven client behavior
Corporate actions such as mergers, divestitures, joint ventures, and hierarchy changes
File storage and attachment workflows
Localization, tagging, and configurable host settings
AI-assisted sustainability support
Auditability and recoverability for regulated workflows

My Backend Work

I structured the backend using Clean Architecture with separate Domain, Application, Infrastructure, and Web layers. The application layer used CQRS with MediatR, FluentValidation, pipeline behaviors, DTO mapping, and consistent response envelopes.

Key work included:

Designing tenant-aware domain models and persistence patterns
Implementing CQRS/MediatR request flows
Adding validation, authorization, performance, and exception pipeline behaviors
Using EF Core interceptors for auditing, soft delete, history tracking, and domain-event dispatch
Designing metadata-driven APIs for dynamic client screens
Creating strategy-based corporate-action workflows
Integrating Azure SQL, Azure Blob Storage, email/SMS abstractions, and OpenAI
Supporting CI/CD deployment to Azure App Service

Technical Highlights

Backend stack: .NET, ASP.NET Core, EF Core, SQL Server, MediatR/CQRS
Architecture: Clean Architecture, domain events, strategy pattern, metadata-driven APIs
Cloud: Azure SQL, Azure Blob Storage, Azure App Service
Reliability: audit trails, history tracking, soft delete, trace IDs, structured exception handling
Extensibility: strategy-based business workflows and dynamic API metadata