🎓 Production-Grade User Management API

From Beginner to Real-World .NET Architect

(Hands-on, No Fake Demos)

👋 About This Course

Most .NET courses teach how to make APIs work.

This course teaches you how to build APIs that survive production.

In this hands-on course, you will build a complete User Management API using .NET 9, following Clean Architecture, real security practices, and enterprise-level design decisions.

This is not a CRUD tutorial.

This is how real backend systems are designed, debugged, and stabilized.

🧠 Who This Course Is For

This course is perfect for you if:

1. You are a beginner or early-career .NET developer
2. You can write APIs but struggle with architecture
3. You want to think like a senior developer
4. You are preparing for backend / system design interviews
5. You want a real portfolio project, not a copied demo
6. You want to understand why things break in production

❌ This course is NOT for people looking for shortcuts

✅ This course IS for people who want real skills

🏗️ What You Will Build

By the end of this course, you will have built a production-style User Management API with:

1. User CRUD (production-safe)
2. Role-based access (Admin / User)
3. Secure password handling (BCrypt)
4. JWT authentication & authorization
5. Pagination, filtering & sorting
6. Swagger-based API testing
7. Global exception handling
8. EF Core migrations & seed data
9. Clean Architecture (4-layered system)

This project is interview-ready and sellable as a portfolio.

🔥 What Makes This Course Different

✅ Built Like a Real System

1. No shortcuts
2. No single-project demos
3. No fake “hello world” examples

✅ Real Errors Included

You will see and understand:

1. DbContext architecture violations
2. Swagger breaking due to bad API design
3. AutoMapper runtime crashes (version mismatch)
4. JWT & middleware misconfiguration

And how to fix them correctly.

✅ Architect-Level Thinking

Every decision is explained:

1. Why this layer?
2. Why not do it another way?
3. What breaks if you change it?

📚 Course Content (Step-by-Step)

Module 1 — Thinking Like a Production Architect

1. Why most APIs fail in real life
2. Clean Architecture explained simply
3. Layer responsibilities & dependency rules

Module 2 — Solution & Project Setup

1. Proper multi-project structure
2. Correct project references
3. Common beginner mistakes

Module 3 — Domain Layer (Business First)

1. Entities vs database tables
2. BaseEntity & audit design
3. Soft delete strategy

Module 4 — Infrastructure Layer (EF Core)

1. DbContext design
2. SQL Server integration
3. Migrations & schema evolution
4. Why Infrastructure must stay isolated

Module 5 — Application Layer (The Brain)

1. DTO design (write vs read models)
2. FluentValidation (real rules)
3. Why controllers should stay dumb

Module 6 — AutoMapper (Correct Usage)

1. Why manual mapping fails
2. Centralized mapping strategy
3. Password hashing during mapping
4. Fixing AutoMapper version crashes

Module 7 — Service Layer (Business Rules)

1. Where real logic belongs
2. Enforcing uniqueness & consistency
3. Soft delete vs hard delete
4. Transaction boundaries

Module 8 — Controller Layer (REST Done Right)

1. Thin controller rule
2. RESTful endpoint design
3. Why “Get All” APIs are dangerous
4. Swagger-breaking mistakes & fixes

Module 9 — Global Exception Handling

1. Why try-catch in controllers is wrong
2. Custom exceptions
3. Centralized error middleware
4. Clean, secure API responses

Module 10 — Authentication & Authorization

1. JWT authentication flow
2. Token generation & validation
3. Role-based access control
4. Admin vs User permissions

Module 11 — Pagination, Filtering & Sorting

1. Why pagination is mandatory
2. Database-level filtering
3. Performance-safe querying
4. Production best practices

Module 12 — Swagger, Migrations & Demo Data

1. Swagger setup with JWT
2. Default Swagger opening
3. EF Core migrations
4. Seed users & roles for testing

Module 13 — Real Errors & Debugging Mindset

1. Architecture mistakes beginners make
2. How to debug systematically
3. How seniors think during failures

Module 14 — Final Architecture Review

1. End-to-end system walkthrough
2. Security review
3. Scalability review
4. Maintainability review

Module 15 — Interview Preparation

1. Architecture questions
2. Design decision explanations
3. How to talk about this project confidently

🧪 Demo Credentials (For Practice)

RoleEmailPassword

Admin

[email protected]

Admin@123

User

[email protected]

User@123

(Demo only — explained clearly in the course)

🎯 What You Will Be Able to Say After This Course

1. “I understand Clean Architecture practically.”
2. “I know why DbContext should not be in controllers.”
3. “I can design secure authentication systems.”
4. “I can debug real runtime issues confidently.”
5. “I can explain my backend decisions in interviews.”

🧑‍🏫 About the Instructor

Sandeep Pal

Senior Full Stack Developer & .NET Architect

10+ Years Experience

Backend • System Design • Clean Architecture

Tech Content Creator & Mentor

This course is based on real-world experience, not theory.

🚀 Final Note

If you are tired of:

1. Shallow tutorials
2. Fake demos
3. Copy-paste projects

This course will change how you think about backend development.