🛠️ Core Backend Concepts
CRUD Operations
Authentication & Authorization (OAuth, JWT)
MVC Architecture
Middlewares
Logging & Error Handling
Environments & Configuration
💡 Tip: Combine these concepts with a small Express, Flask, or ASP.NET Core project for better understanding.
🚧 Backend Frameworks
Node.js
Express.js Crash Course
Express Middleware
.NET / ASP.NET Core
MVC vs Minimal APIs
Dependency Injection in ASP.NET Core
Python
Flask vs Django
Build REST APIs with Flask
Java
Spring Boot Basics
Dependency Injection in Spring
🗃️ Databases
SQL Basics (PostgreSQL / SQL Server)
Writing Queries with JOINs
Indexing & Query Optimization
ORM (Entity Framework, Sequelize, SQLAlchemy)
NoSQL (MongoDB Essentials)
🔨 Practice Projects
Build a Notes API
Build an Auth System with JWT
Blog CMS Backend
File Upload API with Validation
💡 Bonus: Provide GitHub repo links or starter templates later.
🔬 Advanced Topics
Caching Strategies (Redis, In-Memory)
Background Jobs (Hangfire, BullMQ, Celery)
Message Queues (RabbitMQ, Kafka)
Microservices & gRPC
API Versioning
Rate Limiting & Throttling
🎯 Interview Preparation
Common Backend Interview Questions
System Design Basics
Build a Scalable URL Shortener
Explain REST vs GraphQL
🔐 Security Basics
Input Validation
XSS, CSRF, SQL Injection
HTTPS & TLS
Secure Password Storage (bcrypt, PBKDF2)
🛡️ Security first! Add these even to your smallest side projects.
🤝 Community & Contributions
Top GitHub Repos to Learn Backend
Awesome Backend Dev Lists
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