Deep Diving into Backend: Learning C# with Blazor and NestJS

November 26, 2025

Deep Diving into Backend: Learning C# with Blazor and NestJS

🎯 Setting the Goal: Mastering Backend Development

After spending significant time building frontend applications with React, Next.js, and working with APIs, I've decided to deep dive into backend development. My goal is to build a comprehensive understanding of backend architecture, patterns, and best practices that will make me a more well-rounded full-stack developer.

🚀 Why Backend Now?

Working on projects like my POS application with MedusaJS has given me valuable experience with backend APIs and integrations. However, I realized that to truly understand how robust backend systems are built, I need to go deeper. I want to:

  • Understand backend architecture patterns and design principles
  • Learn how to build scalable, maintainable APIs
  • Master authentication, authorization, and security best practices
  • Explore different backend frameworks and their use cases
  • Build projects that demonstrate enterprise-level backend skills

💻 Learning C# with Blazor

I've started learning C# with Blazor as my first step into backend development. This choice aligns perfectly with my goal because:

Why C#?

  • Enterprise-grade language: Widely used in enterprise applications
  • Strong typing: Helps catch errors at compile-time
  • Rich ecosystem: Extensive libraries and frameworks
  • Performance: Excellent performance characteristics
  • Cross-platform: .NET Core runs on Windows, Linux, and macOS

Why Blazor?

  • Full-stack with one language: Write both frontend and backend in C#
  • Component-based architecture: Similar to React, which I already know
  • Server-side and WebAssembly options: Flexibility in deployment
  • Modern web development: Built on modern web standards

What I'm Learning:

  • C# fundamentals and advanced features
  • .NET Core architecture and dependency injection
  • Blazor Server and Blazor WebAssembly
  • Entity Framework Core for database operations
  • Authentication and authorization in .NET
  • Building RESTful APIs with ASP.NET Core

🏗️ Deep Diving into NestJS

In parallel, I'm taking a comprehensive NestJS course on Udemy to master this powerful Node.js framework. NestJS is particularly interesting because:

Why NestJS?

  • TypeScript-first: Leverages my existing TypeScript knowledge
  • Enterprise patterns: Built with Angular-inspired architecture
  • Modular architecture: Encourages clean, maintainable code
  • Decorators and dependency injection: Modern development patterns
  • Extensive ecosystem: Great integration with databases, authentication, and more

Course Focus Areas:

  • NestJS fundamentals and core concepts
  • Modules, controllers, and providers
  • Dependency injection and IoC containers
  • Database integration (PostgreSQL with TypeORM)
  • Authentication and JWT implementation
  • RESTful and GraphQL APIs
  • Testing strategies
  • Deployment and production best practices

📚 My Learning Approach

I'm taking a structured approach to ensure I get the most out of both technologies:

1. Hands-on Practice

  • Building small projects to reinforce concepts
  • Implementing real-world features (authentication, CRUD operations, etc.)
  • Experimenting with different patterns and approaches

2. Documentation and Resources

  • Following official documentation closely
  • Reading best practices and design patterns
  • Engaging with community resources and discussions

3. Project-Based Learning

  • Planning to build a full-stack application combining both technologies
  • Applying learned concepts to solve real problems
  • Building a portfolio of backend projects

🎓 What I've Learned So Far

C# & Blazor:

  • Understanding the .NET ecosystem and project structure
  • Working with Razor components and component lifecycle
  • Implementing basic CRUD operations
  • Exploring Blazor Server vs WebAssembly trade-offs

NestJS:

  • Setting up NestJS projects and understanding the CLI
  • Creating modules and understanding the modular architecture
  • Implementing controllers and services
  • Working with DTOs (Data Transfer Objects) for validation
  • Understanding dependency injection and providers

🔄 Connecting the Dots

What's exciting about learning both technologies is seeing the similarities and differences in backend development patterns:

  • Dependency Injection: Both NestJS and .NET Core use DI extensively
  • Modular Architecture: Both encourage modular, maintainable code
  • Type Safety: TypeScript and C# both provide strong typing
  • Middleware/Interceptors: Similar concepts for cross-cutting concerns
  • Database ORMs: Entity Framework Core vs TypeORM

Understanding these patterns across different frameworks helps build a deeper understanding of backend architecture principles.

🎯 Next Steps

My learning roadmap includes:

Short-term (Next 2-3 months):

  • Complete the NestJS Udemy course
  • Build a RESTful API with NestJS and PostgreSQL
  • Create a Blazor application with backend integration
  • Implement authentication and authorization in both frameworks

Medium-term (3-6 months):

  • Build a full-stack application showcasing both technologies
  • Explore microservices architecture
  • Learn about message queues and event-driven architecture
  • Implement advanced patterns (CQRS, Repository Pattern, etc.)

Long-term:

  • Contribute to open-source backend projects
  • Share knowledge through blog posts and tutorials
  • Build enterprise-level applications
  • Mentor others in backend development

💡 Key Takeaways

  1. Backend development requires a different mindset: More focus on architecture, scalability, and security
  2. Patterns matter: Understanding design patterns is crucial for building maintainable backends
  3. Type safety helps: Both TypeScript and C# catch errors early
  4. Practice is essential: Building projects is the best way to learn
  5. Documentation is your friend: Both ecosystems have excellent documentation

🚀 Stay Tuned

I'll be sharing regular updates about my backend learning journey, including:

  • Code examples and tutorials
  • Project walkthroughs
  • Challenges and solutions
  • Comparisons between different approaches
  • Best practices I discover along the way

If you're also learning backend development or have experience with C#, Blazor, or NestJS, I'd love to connect and learn together! Feel free to share your own journey or any resources that have been helpful.

Let's build robust, scalable backends together! 🎉