ProjectTeamBind Backend Improvement Tasks

This document contains a comprehensive list of actionable improvement tasks for the ProjectTeamBind backend codebase. Tasks are organized by category and priority, with each item marked with a checkbox for tracking completion.

🏗️ Architecture & Build System

Build Configuration

• Remove Spring Boot plugin from library modules (public/*) that don't need it
• Create separate build configurations for different module types (library vs service vs application)
• Remove duplicate dependencies (e.g., dotenv-java) from individual module build.gradle files
• Add dependency version management using Spring Boot BOM or custom BOM
• Implement consistent dependency scoping across all modules
• Add build performance optimizations (parallel builds, build cache)
• Create module-specific test configurations

Module Structure

• Add missing modules to settings.gradle (e.g., bandroom:statistics)
• Review and standardize module naming conventions
• Create clear module dependency hierarchy documentation
• Implement proper module isolation (prevent circular dependencies)
• Add module-level README files explaining purpose and dependencies

🔒 Security Improvements

Authentication & Authorization

• Fix critical security flaw in AuthService.confirmCode() method (currently uses weak string contains check)
• Implement proper email verification code generation and validation
• Add rate limiting for authentication endpoints
• Implement account lockout mechanism after failed login attempts
• Add password strength validation with configurable policies
• Implement secure password reset functionality
• Add multi-factor authentication support
• Implement proper session management and token rotation

Data Protection

• Add input validation annotations to all DTOs
• Implement proper SQL injection prevention checks
• Add XSS protection for API responses
• Implement data encryption for sensitive fields
• Add audit logging for security-sensitive operations
• Implement proper error handling to prevent information leakage

🧪 Testing Improvements

Test Coverage & Quality

• Standardize test naming convention (currently mixed Korean/English)
• Add missing test dependencies and mocks in AuthServiceTest
• Implement comprehensive test coverage for AuthService (login, changePassword, confirmedEmail methods)
• Add integration tests for critical business flows
• Implement test data builders/factories for consistent test data
• Add performance tests for critical endpoints
• Implement contract testing between modules
• Add mutation testing to verify test quality

Test Infrastructure

• Create shared test utilities and base test classes
• Implement test containers for database integration tests
• Add test profiles for different testing scenarios
• Create automated test reporting and coverage analysis
• Implement parallel test execution configuration

💻 Code Quality & Standards

Code Structure & Patterns

• Implement consistent error handling patterns across all services
• Add proper validation in service methods (e.g., OperationScheduleService)
• Standardize response object creation patterns
• Implement proper logging with structured format
• Add method-level documentation for complex business logic
• Implement consistent null-safety patterns
• Add proper exception hierarchy and custom exceptions

Performance Optimizations

• Optimize stream operations in OperationScheduleService
• Implement database query optimization and indexing strategy
• Add caching strategy for frequently accessed data
• Implement pagination for large result sets
• Add database connection pooling configuration
• Implement async processing for non-critical operations

Code Formatting & Style

• Remove unnecessary blank lines and formatting inconsistencies
• Implement consistent import organization
• Add EditorConfig for consistent code formatting
• Implement code style checks with Checkstyle or SpotBugs
• Add pre-commit hooks for code quality checks

📊 Monitoring & Observability

Logging & Metrics

• Implement structured logging with correlation IDs
• Add application metrics collection (Micrometer)
• Implement health checks for all services
• Add distributed tracing support
• Create monitoring dashboards
• Implement alerting for critical system events

Error Handling & Debugging

• Implement global exception handlers
• Add proper error response standardization
• Implement request/response logging for debugging
• Add performance monitoring and profiling
• Create error tracking and reporting system

🗄️ Data Management

Database Optimization

• Implement database migration strategy (Flyway/Liquibase)
• Add database indexing strategy
• Implement proper transaction management
• Add database connection monitoring
• Implement data archiving strategy
• Add database backup and recovery procedures

Data Validation & Integrity

• Add comprehensive input validation
• Implement data consistency checks
• Add referential integrity constraints
• Implement data sanitization procedures
• Add data retention policies

🚀 DevOps & Deployment

Containerization & Deployment

• Create Dockerfiles for each service
• Implement multi-stage Docker builds
• Add Docker Compose for local development
• Create Kubernetes deployment manifests
• Implement CI/CD pipeline configuration
• Add environment-specific configuration management

Infrastructure as Code

• Create infrastructure provisioning scripts
• Implement configuration management
• Add secrets management solution
• Create backup and disaster recovery procedures
• Implement monitoring and alerting infrastructure

📚 Documentation & API

API Documentation

• Enhance OpenAPI/Swagger documentation
• Add API versioning strategy
• Create API usage examples and tutorials
• Implement API rate limiting documentation
• Add API changelog and migration guides

Technical Documentation

• Create architecture decision records (ADRs)
• Add deployment and operational guides
• Create troubleshooting documentation
• Add performance tuning guides
• Create security best practices documentation

🔧 Configuration & Environment

Environment Management

• Standardize environment variable naming
• Implement configuration validation
• Add environment-specific property files
• Create configuration documentation
• Implement feature flags system
• Add configuration hot-reloading capability

External Integrations

• Implement proper retry mechanisms for external services
• Add circuit breaker patterns
• Implement service discovery
• Add external service monitoring
• Create integration testing for external dependencies

📈 Performance & Scalability

Application Performance

• Implement connection pooling optimization
• Add JVM tuning configurations
• Implement memory usage optimization
• Add performance benchmarking
• Create load testing scenarios
• Implement auto-scaling strategies

Database Performance

• Optimize database queries and add proper indexing
• Implement read replicas for read-heavy operations
• Add database query monitoring
• Implement database partitioning strategy
• Add database performance tuning

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Priority Legend

• High Priority: Security vulnerabilities, critical bugs, and foundational improvements
• Medium Priority: Performance optimizations, testing improvements, and code quality
• Low Priority: Documentation, monitoring enhancements, and nice-to-have features

Completion Tracking

• Total Tasks: 89
• Completed: 0
• In Progress: 0
• Not Started: 89

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Last Updated: 2025-01-04 Next Review: 2025-01-11