Phuong Le is a Vietnamese software engineer and Go educator focused on the language internals and idiomatic patterns underneath production Go code.
His CourseFlix listing carries The Anatomy of Go — a deep treatment of how Go's runtime actually works: goroutine scheduling, the garbage collector, the memory model, the channels implementation, and the engineering patterns that come from understanding the language at this level.
Material is paid and aimed at intermediate-and-up Go developers ready to deepen their understanding of the runtime. For broader content, see CourseFlix's Golang category page.