Server Side and Business Logic Implementation Questions

Focuses on designing and writing backend code that implements business requirements and domain rules. Topics include separation of concerns between presentation application and domain layers, where to place business logic versus orchestration and infrastructure code, data validation and transformation, conditional and transactional logic, error handling and graceful degradation, input sanitization and security considerations, idempotency and concurrency control, database interaction patterns and transaction management, caching and performance trade offs, testing strategies including unit and integration tests for business rules, logging and observability, and maintainability practices such as modularization and clear interfaces.