Alexey Makhotkin is a software engineer and database educator focused on the practical craft of designing relational schemas — a skill most working developers learn the hard way through years of production data-model mistakes.
His CourseFlix listing carries the Database Design Book — a focused treatment of normalisation, indexing strategy, and the modeling decisions that lock in early in a project's life and become expensive to change later.
Material is paid and aimed at developers ready to take database design as a deliberate skill rather than a side-effect of using whatever ORM ships with their framework.