Stephen Margheim is a US software engineer and Ruby on Rails educator focused on the senior-engineering side of Rails work — particularly the architectural patterns and operational practices that separate scaled Rails applications from generic Rails CRUD apps.
His CourseFlix listing carries High Leverage Rails — a structured treatment of senior Rails engineering: the patterns that compound (database design, query optimisation, background-job architecture, caching strategy, deployment automation), and the engineering decisions that show up in production Rails applications running at scale.
Material is paid and aimed at intermediate-and-up Rails developers ready to think architecturally. For broader content, see CourseFlix's Ruby on Rails category page.