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Backend Coding Standards

Living Document

This is a living document that evolves with our engineering practices. Last updated: [Date]

Architecture Principles​

Clean Architecture​

SOLID Principles​

  1. Single Responsibility
  2. Open/Closed
  3. Liskov Substitution
  4. Interface Segregation
  5. Dependency Inversion

Code Organization​

Project Structure​

src/
├── domain/
│   ├── entities/
│   ├── repositories/
│   └── services/
├── application/
│   ├── use-cases/
│   ├── interfaces/
│   └── services/
└── infrastructure/
    ├── persistence/
    ├── external/
    └── config/

Naming Conventions​

Naming Guidelines
  • Use meaningful and pronounceable variable names
  • Classes should be nouns (User, Order)
  • Methods should be verbs (createUser, processOrder)

Best Practices​

Error Handling​

try {
  await processOrder(orderId);
} catch (error) {
  if (error instanceof ValidationError) {
    // Handle validation errors
  } else if (error instanceof DatabaseError) {
    // Handle database errors
  } else {
    // Handle unexpected errors
  }
}

Testing​

Test Pyramid​

Security​

Development Workflow​

Git Workflow​

  1. Create feature branch
  2. Write tests
  3. Implement feature
  4. Code review
  5. Merge to main

Code Review Checklist​

  • Tests included
  • Documentation updated
  • Security considerations
  • Performance impact
  • Error handling

Performance​

Guidelines​

  • Use caching appropriately
  • Optimize database queries
  • Implement pagination
  • Monitor memory usage

Monitoring​

See our Monitoring Standards for implementation details.

Documentation​

Required Documentation​

  • API documentation
  • Architecture decisions
  • Setup instructions
  • Troubleshooting guides

Tools & Templates​

  • Swagger/OpenAPI
  • Architecture Decision Records (ADRs)
  • README templates