Mikhail Smarshchok is a software engineer and educator behind the SystemDesignFightClub brand — focused on the system-design-interview discipline and the architectural patterns underneath production large-scale systems. His material is widely cited in the system-design-interview-prep community.
His CourseFlix listing carries System Design for Interviews and Beyond — a comprehensive treatment of system-design that covers both the interview-prep curriculum and the broader architectural foundations underneath production systems.
Material is paid and aimed at engineers preparing for senior-level system-design interviews. For broader content, see CourseFlix's System Design & Architecture category page.