Updated April 2026

100% Free Intermediate — for developers… No Signup

Mid-Level .NET + React Playbook: 45 Lessons for the Full-Stack Interview

C#, ASP.NET Core, EF Core, SQL, architecture, React and delivery — 45 short lessons that explain the why, built to be remembered

45Lessons
~10 minPer Lesson
$0Forever
6Topics
Start Lesson 1 — Free See Curriculum Download PDF / Word

What you'll learn

Advanced C#
ASP.NET Core
EF Core + SQL
Design and Microservices
React + TypeScript
Testing and Deployment

Full curriculum

45 lessons organized by topic. Click any lesson to jump straight in.

1. Advanced C# (9 lessons)

  1. 1OOP in C#: The Four Pillars, Honestly
  2. 2SOLID: Five Rules That Keep Code Changeable
  3. 3Generics and Constraints
  4. 4Collections: Picking the Right Container
  5. 5LINQ and Deferred Execution
  6. 6Delegates, Func, Action and Events
  7. 7Async/Await: What Really Happens
  8. 8Threading and Concurrency
  9. 9Dependency Injection and Service Lifetimes

2. ASP.NET Core (7 lessons)

  1. 10Request Lifecycle and the Middleware Pipeline
  2. 11RESTful API Design
  3. 12Authentication with JWT
  4. 13Authorization: Roles, Claims and Policies
  5. 14Exception Handling and Logging
  6. 15Validation and API Security
  7. 16Calling Third-Party APIs Safely

3. EF Core + SQL (6 lessons)

  1. 17EF Core Basics and Relationships
  2. 18Change Tracking and Loading Data
  3. 19Transactions and Concurrency
  4. 20Query Optimization in EF Core
  5. 21SQL: Joins, Indexes and Execution Plans
  6. 22Database Design

4. Design and Microservices (7 lessons)

  1. 23Design Patterns You Will Actually Meet
  2. 24Repository and Unit of Work
  3. 25Clean Architecture
  4. 26Monolith vs Microservices
  5. 27Service-to-Service Communication
  6. 28Caching
  7. 29Background Jobs, Performance and Scale

5. React + TypeScript (8 lessons)

  1. 30Components and Props
  2. 31State and Lifecycle
  3. 32Hooks
  4. 33Context API and Redux Toolkit
  5. 34API Integration with a .NET Backend
  6. 35Authentication and Protected Routes
  7. 36Reusable Components, UI Libraries and Accessibility
  8. 37Performance Optimization

6. Testing and Deployment (8 lessons)

  1. 38Unit Testing
  2. 39Integration Testing
  3. 40End-to-End Testing Fundamentals
  4. 41Git, Pull Requests and Code Review
  5. 42Docker for .NET and React
  6. 43CI/CD Pipelines
  7. 44Cloud and IIS Deployment
  8. 45Agile, Scrum and Technical Documentation
Start the Course — Free Download PDF / Word

Frequently asked questions

Is this course really free?

Yes — 100% free. No signup, no credit card, no email required. All lessons, quizzes, and certificate of completion are free forever.

Do I need to install anything?

No. The entire course runs in your browser on phone, tablet, or laptop. No downloads, no accounts.

How long does the course take?

About 10 minutes per lesson. One lesson per day takes about 1-2 months total. Many learners finish in 2-3 weeks by doing multiple lessons per sitting.

Will I get a certificate?

Yes. After completing all lessons, generate a personalized certificate with your name and share it on LinkedIn. Not accredited, but signals commitment to recruiters.

Do I need prior experience?

No. Every course is designed for complete beginners. Each lesson starts with a plain-English analogy before any technical concepts.

How is this different from YouTube tutorials?

Three things: interactive — quizzes and hands-on challenges after every lesson; structured — a deliberate learning path, not random videos; gamified — XP, streaks, spaced repetition so knowledge actually sticks.