James Smith is a software engineer and educator focused on the systems-engineering side of database internals — particularly the from-scratch implementation work that builds genuine understanding of how databases actually function.
His CourseFlix listing carries Build Your Own Database in Go From Scratch — a from-scratch database implementation walkthrough in Go, covering the storage engine, the B-tree index structure, the SQL parser, and the transaction model that distinguishes a database from a key-value store.
Material is paid and aimed at engineers ready to understand databases through hands-on implementation. For broader content, see CourseFlix's Golang category page.