Backend Development

Backend development is simple, you just need to learn these...

1. Internet & Protocol Basics

• HTTP HTTPS History
• HTTP methods
• Status codes
• Request headers
• Response headers

2. API Development

• API design
• RESTful APIs
• GraphQL
• WebSockets
• Server-side rendering
• API versioning
• API Gateway
• API docs (Swagger/OpenAPI)
• Postman/Insomnia

3. Backend Core Concepts

• Middleware
• Error handling
• Logging
• Input validation
• Output sanitization
• File uploads
• Streaming data
• Pagination
• Filtering and sorting
• Background jobs
• Cron jobs
• Task scheduling
• Worker processes

4. Authentication & Security

Authentication & Authorization

• Authentication
• Authorization
• JWT tokens
• Session management
• Cookies
• OAuth 2.0
• Two-factor authentication (2FA)
• Single sign-on (SSO)

Access Control

• RBAC (Role-Based Access Control)
• ABAC (Attribute-Based Access Control)

Security Best Practices

• CORS (Cross-Origin Resource Sharing)
• CSRF protection
• XSS prevention
• SQL injection prevention
• Password hashing
• Bcrypt/Argon2
• Salt and pepper
• Secrets management

5. Databases

Concept & Design

• Database design
• ACID properties
• CAP theorem
• Normalization
• Denormalization
• Transactions

Technologies & Tools

• SQL queries
• NoSQL databases
• ORM (Object-Relational Mapping)
• Database indexing
• Query optimization
• Connection pooling
• Migrations
• Seeding data

Search & Indexing

• Full-text search
• Elasticsearch

6. Caching & Performance

• Caching strategies
• Redis
• Memcached
• CDN integration
• Rate limiting
• Throttling

7. Architecture & Scalability

Architectural Patterns

• Monolithic architecture
• Microservices architecture
• Service-oriented architecture (SOA)
• Event-driven architecture
• CQRS pattern
• Saga pattern

Scaling Strategies

• Horizontal scaling
• Vertical scaling
• Load balancing

Messaging & Communication

• Message queues
• Pub/Sub patterns
• Service mesh

8. DevOps & Infrastructure

• Docker containers
• Kubernetes orchestration
• CI/CD pipelines
• Environment variables
• Configuration management
• Process management
• Production deployment strategies

9. System Internals & Runtime

• Async/await patterns
• Promises
• Callbacks
• Thread pools
• Memory management
• Garbage collection
• Performance profiling
• Benchmarking

10. Testing, Quality & Tools

• Testing (unit, integration, E2E)
• Mocking and stubbing
• Application performance monitoring (APM)
• Monitoring
• Debugging techniques
• Code review practices
• Version control (Git)