Lewis Bright

Your current approach with Rails services is solid. For better performance, use Sidekiq for background API data fetching. Consider HTTParty or Faraday for API integration, and use FasterCSV for CSV generation. Stick with Rails' Active Record for your DB and PostgreSQL if you need advanced queries. Jumpstart Pro is a great choice for building internal tools quickly with features like authentication already in place.

The Law of Demeter and delegation are two design principles in object-oriented programming that enhance encapsulation, maintainability, and reduce coupling between classes.