🚀 Software Engineering Handbook

Welcome to my personal Software Engineering knowledge base.

Browse the tree below — every leaf links directly to a page.

• 🐍 Python

  • Python Internals
    • Internals
    • Python Objects
    • Memory Management
    • Variable References
    • Mutable vs Immutable
    • Equality vs Identity
    • Namespaces and Scope
    • Object Interning
  • Functions
    • First Class Functions
    • Lambda Functions
    • Closure
    • Decorators
    • Generators
  • Concurrency
    • Concurrency vs Parallelism
    • GIL
    • Multithreading
    • Multiprocessing
    • Asyncio
    • Synchronization
    • Instance Method
  • Methods
    • Static Method
    • Class Method
    • Property Method

• 🎯 Design Patterns (Gang of Four)

  • Creational
    • Singleton
    • Factory
    • Abstract Factory
    • Builder
    • Prototype
  • Structural
    • Adapter
    • Decorator
    • Facade
    • Proxy
    • Composite
    • Bridge
    • Flyweight
  • Behavioral
    • Strategy
    • Observer
    • Command
    • State
    • Template
    • Chain of Responsibility
    • Iterator
    • Mediator
    • Memento
    • Visitor

• ⚙️ Backend Engineering

  • 🔐 Authentication
    • Identity and Authentication
    • Authorization
    • Session
    • Cookies
    • JWT
    • Access & Refresh Tokens
    • Authentication System Design
  • 🌐 API Design
    • REST API
    • Pagination
    • Rate Limiting
    • Idempotency
    • Webhooks
    • API Versioning
    • API Gateway
    • GraphQL
    • gRPC
  • 🗄 Databases
    • Database Fundamentals
    • Schema Design
    • Transactions
    • ACID
    • Isolation Levels
    • Locks
    • Indexing
    • Query Optimization
    • Replication
    • Sharding
    • Partitioning
    • Migrations
  • ⚡ Caching
    • Cache Patterns
    • Cache Eviction Policies
    • Cache Stampede
    • Cache Invalidation
    • Redis
    • Distributed Cache
    • CDN
  • 📨 Message Queues
    • Messaging Fundamentals
    • Kafka
    • RabbitMQ
    • Amazon SQS
    • Dead Letter Queues
    • Retry Strategies
    • Idempotent Consumers
    • Transactional Outbox Pattern
    • Event-Driven Architecture
  • 🔗 Distributed Systems
    • CAP Theorem
    • Consistency Models
    • Consensus
    • Leader Election
    • Distributed Locks
    • Service Discovery
    • Circuit Breaker
    • Retry and Backoff
    • Two-Phase Commit
    • Vector Clocks
    • Saga Pattern
  • 🌐 Networking
    • DNS
    • TCP
    • UDP
    • TLS
    • HTTP
    • HTTPS
    • HTTP/2
    • HTTP/3
    • WebSockets
    • SSE
  • 📊 Observability
    • Logging
    • Metrics
    • Distributed Tracing
    • OpenTelemetry
    • Prometheus
    • Grafana
    • Alerting
    • SLI, SLO, SLA & Error Budgets
  • 🚀 Performance
    • Latency
    • Throughput
    • Load Balancing
    • Horizontal Scaling
    • Vertical Scaling
    • Connection Pooling
    • Backpressure
    • Profiling
    • Benchmarking and Load Testing
  • 🏗 Architecture
    • Monolith
    • Modular Monolith
    • Microservices
    • Domain-Driven Design
    • Event-Driven Systems
    • Event Sourcing
    • CQRS
    • Clean Architecture
    • Hexagonal Architecture
  • 🛡 Backend Security
    • SQL Injection
    • Command Injection
    • Insecure Deserialization
    • XSS (Cross-Site Scripting)
    • CSRF
    • Clickjacking
    • CORS
    • SSRF
    • Session Hijacking
    • Replay Attacks
    • OWASP Top 10