In recent years, combining modern frontend based on React with the robust backend offered by .NET Core (C#) has become an increasingly popular choice for developing scalable web applications. This article gives you an overview of this technology combination and prepares you for developing a real project: a blog-type website built on solid principles.

🛠️ Why React + .NET Core?

Advantages of React:

• ⚡ High performance: virtual DOM and efficient updates.

• ♻️ Reusable components: the UI is composed of declarative components.

• 🌍 Vast ecosystem: millions of packages available (npm/yarn).

• 👥 Community and support: used by large companies (Meta, Instagram, Airbnb etc.).

Advantages of .NET Core:

• 💪 Performance and scalability: .NET Core is cross-platform, fast, and efficient.

• 🧱 Clean and testable architecture: supports DDD, CQRS, MediatR etc.

• 🔐 Built-in security: Identity, JWT authentication, authorization.

• 🌐 Easy database integration: via Entity Framework Core.

• ☁️ Cloud-ready (Azure friendly)

🧩 Communication between React and .NET Core

The React application handles:

• Client-side routing (SPA)

• UI, validation, interaction

• HTTP calls to API

The .NET Core application (Web API) handles:

• Business logic (DDD)

• Data access (EF Core, SQL)

• Authentication/authorization

• Server-side validations and error returning

🔄 The two parts communicate via HTTP (REST APIs), using libraries like axios on the frontend.

🧱 When is this stack useful?

• 🔖 Content websites: blogs, magazines, landing pages

• 🛒 eCommerce applications: fast frontend + robust backend

• 🧾 Administrative applications: dashboards, custom CMSs

• 🎓 Educational or internal applications: learning/testing spaces

• 🧠 Projects that require clear separation between UI and logic

🗂️ Recommended project structure

The project will be divided as follows:

• Frontend (React + TypeScript) – independent, separate folder

• Backend (.NET Core Web API) – organized by DDD: Domain, Application, Infrastructure

• Database – SQL Server (or PostgreSQL)

• Communication – REST API with JWT Authentication

📌 What you will learn in this series

• How to apply DDD in a real application

• How to structure a backend application in clear layers

• How to build a modern frontend with React + TypeScript

• How to test both frontend and backend

• How to implement JWT authentication and route protection

🧭 What’s next

In the next article, we will create the basic structure of the application: a backend in .NET Core and a React frontend, organized in two separate projects, ready for development.