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+# Python Backend Architecture Review Checklist
+
+This checklist serves as a quick reference for conducting comprehensive architecture reviews.
+
+## System Architecture
+
+- [ ] Architecture style matches scale and complexity
+- [ ] Service boundaries are well-defined
+- [ ] Communication patterns are appropriate
+- [ ] No unnecessary over-engineering
+- [ ] Single points of failure identified and addressed
+- [ ] Dependency management is clear
+- [ ] Framework choice is justified (FastAPI/Django/Flask/etc.)
+- [ ] Async patterns are properly utilized where needed
+
+## Database Architecture
+
+- [ ] Database type selection is appropriate
+- [ ] Schema is properly normalized/denormalized
+- [ ] Indexes are strategically placed
+- [ ] Sharding/partitioning strategy exists if needed
+- [ ] Read replicas planned for scale
+- [ ] Caching layer is implemented
+- [ ] Connection pooling is configured
+- [ ] N+1 query issues are prevented
+- [ ] ORM choice is appropriate
+- [ ] Migration strategy is defined
+- [ ] Backup and DR plans exist
+
+## API Design
+
+- [ ] API design pattern is consistent (REST/GraphQL/gRPC)
+- [ ] Endpoints follow naming conventions
+- [ ] Versioning strategy is defined
+- [ ] Authentication/authorization is implemented
+- [ ] Rate limiting exists
+- [ ] API documentation is auto-generated
+- [ ] Error handling is consistent
+- [ ] Pagination is implemented
+- [ ] Input validation uses Pydantic or similar
+- [ ] OpenAPI/Swagger documentation exists
+
+## Security
+
+- [ ] Authentication mechanism is secure (JWT/OAuth2)
+- [ ] Authorization model is well-defined (RBAC/ABAC)
+- [ ] CORS is properly configured
+- [ ] CSRF protection is enabled where needed
+- [ ] Data is encrypted in transit (HTTPS/TLS)
+- [ ] Data is encrypted at rest where needed
+- [ ] Secrets management solution exists
+- [ ] SQL injection is prevented (parameterized queries)
+- [ ] XSS protections are in place
+- [ ] Security headers are configured
+- [ ] Dependency scanning is automated
+- [ ] Password hashing uses bcrypt/argon2
+- [ ] Audit logging is implemented
+- [ ] Rate limiting prevents abuse
+- [ ] Input sanitization is thorough
+
+## Scalability & Performance
+
+- [ ] Scaling strategy is defined (horizontal/vertical)
+- [ ] Load balancer is configured
+- [ ] Auto-scaling rules exist
+- [ ] Caching strategy is multi-layered
+- [ ] Background jobs use queue system (Celery/RQ)
+- [ ] Long-running tasks are async
+- [ ] Database connection pooling is optimized
+- [ ] ASGI server is production-ready
+- [ ] GIL limitations are addressed
+- [ ] Performance monitoring is in place
+- [ ] Load testing has been conducted
+
+## Observability
+
+- [ ] Structured logging is implemented
+- [ ] Log aggregation is configured
+- [ ] Metrics are collected (Prometheus/StatsD)
+- [ ] Distributed tracing exists (OpenTelemetry)
+- [ ] Error tracking is configured (Sentry)
+- [ ] Health check endpoints exist
+- [ ] Alerting rules are defined
+- [ ] Performance baselines are established
+- [ ] Business metrics are tracked
+- [ ] Dashboards are created
+
+## Deployment & Infrastructure
+
+- [ ] Dockerfile is optimized (multi-stage)
+- [ ] Container orchestration is configured
+- [ ] CI/CD pipeline is automated
+- [ ] Environment parity exists (dev/staging/prod)
+- [ ] Infrastructure as Code is used
+- [ ] Deployment strategy is safe (blue-green/canary)
+- [ ] Rollback procedure is defined
+- [ ] Configuration is externalized
+- [ ] Secrets are managed securely
+- [ ] Dependencies are pinned and managed (Poetry/PDM)
+
+## Code Organization
+
+- [ ] Project structure is clear and logical
+- [ ] Module boundaries are well-defined
+- [ ] No circular dependencies exist
+- [ ] Dependency injection is used appropriately
+- [ ] Configuration management is centralized
+- [ ] Type hints are used throughout
+- [ ] Tests are well-organized (pytest)
+- [ ] Code follows PEP 8 standards
+- [ ] Linting/formatting is automated (Ruff/Black)
+
+## Resilience
+
+- [ ] Retry logic exists for external calls
+- [ ] Circuit breakers protect external services
+- [ ] Timeouts are configured appropriately
+- [ ] Graceful degradation is implemented
+- [ ] Error handling is consistent
+- [ ] Dead letter queues exist
+- [ ] Bulkhead patterns separate concerns
+- [ ] Rate limiting protects resources
+
+## Testing
+
+- [ ] Unit tests exist (>80% coverage)
+- [ ] Integration tests cover critical paths
+- [ ] API tests validate contracts
+- [ ] Load tests verify performance
+- [ ] Security tests check vulnerabilities
+- [ ] Test fixtures are reusable
+- [ ] Mocking is used appropriately
+- [ ] CI runs tests automatically
+
+## Documentation
+
+- [ ] API documentation is complete
+- [ ] Architecture diagrams exist
+- [ ] Setup instructions are clear
+- [ ] Configuration is documented
+- [ ] Deployment process is documented
+- [ ] Code has docstrings
+- [ ] README is comprehensive
+- [ ] Contributing guidelines exist
+
+## Compliance & Standards
+
+- [ ] GDPR compliance addressed if applicable
+- [ ] HIPAA compliance addressed if applicable
+- [ ] SOC 2 requirements met if applicable
+- [ ] Data retention policies defined
+- [ ] Privacy policies implemented
+- [ ] Audit trails exist
+- [ ] 12-Factor App principles followed