This book is a complete, end-to-end engineering guide for building a modern digital banking platform using .NET 9, Clean Architecture, Domain-Driven Design (DDD), Angular (Nx Monorepo), Docker, PostgreSQL, and GitHub Actions CI/CD.

Unlike typical programming books, this guide teaches how real financial software is built:

• Microservices in .NET 9 with clean boundaries
• Domain-driven modeling of banking products
• Building a scalable Angular monorepo with Nx
• Containerization from day one
• Automated testing (unit, integration, E2E)
• Secure APIs and IAM
• Event-driven workflows
• GitHub Actions pipelines (build, test, lint, security scans)
• Modern engineering practices used in fintech companies

You will build two full applications:

1. Branch/Cashier App (Open accounts, deposits, withdrawals, customer KYC)
2. Customer Internet Banking App (Transfers, airtime/electricity purchases, statements)

The platform includes:

• AccountService
• CustomerService
• TransactionService
• NotificationService
• IAM / IdentityService
• API Gateway using YARP
• Observability stack
• Automated pipeline integration
• And more

This is a practical, real-world guide with extensive code, diagrams, testing, and DevOps workflows. Ideal for full-stack developers who want to master enterprise systems, microservices, and modern software engineering.

Who This Book Is For

This book is for full-stack developers, backend engineers, and architects who want to build modern, production-grade systems using .NET for the backend and Angular for the frontend. It is especially valuable if you want to learn full-stack microservices, API-driven development, and shared monorepo workflows using Nx.

You will benefit from this book if you:

• Build full-stack applications using .NET + Angular
• Want to adopt a monorepo architecture using Nx
• Need real-world, enterprise-grade clean architecture examples
• Want to design consistent front-end & back-end boundaries
• Prefer practical, hands-on implementation over theory
• Work in teams maintaining large codebases with modular design

No previous experience with microservices or Nx is required — everything is explained step-by-step.

What You Will Learn

By the end of this book, you will have built a complete full-stack banking platform using .NET, Angular, Nx, and modern cloud-native architecture. You will learn:

🔹

Backend (.NET 9)

• Clean Architecture, DDD, CQRS, MediatR
• Event-driven microservices with domain events
• Minimal APIs and strongly typed endpoints
• PostgreSQL integration with EF Core
• Docker containers and local orchestration
• Integration tests, unit tests, and API tests
• YARP API Gateway with per-service Swagger
• Authentication & authorization patterns
• Observability: logs, metrics, tracing

🔹

Frontend (Angular + Nx Monorepo)

• Setting up an Nx-powered enterprise Angular monorepo
• Designing reusable Angular libraries and feature modules
• Building clean service layers for API consumption
• Strong typing with OpenAPI-generated Angular clients
• State management best practices (NgRx or Signals Stores)
• Building an admin dashboard, customer portal, and shared UI
• Route guards, interceptors, and front-end security
• High-quality UI/UX patterns for enterprise apps

🔹

Full-Stack Architecture

• Designing front-end/back-end boundaries
• Integrating front-end apps with microservices
• Consistent domain modeling across layers
• Versioning shared contracts (DTOs, API models)
• Avoiding tight coupling between UI and backend services
• Real-world CI/CD pipelines for monorepos and microservices

Every concept is explained while building a real working system end-to-end.

Keywords: .NET 9, Angular, Microservices, Docker, Fintech, Clean Architecture, Banking, Nx Monorepo, CI/CD, GitHub Actions, TDD, DDD