Erick Wendel is a Brazilian software engineer and Microsoft / Google / Node.js Foundation Member, one of the most active independent Node.js educators online. He is widely cited for the depth of his Node.js streams and runtime-internals content.
His CourseFlix listing carries two Erick Wendel courses: Mastering Node.js Streams with Erick Wendel (a deep treatment of the streams API and the back-pressure / piping patterns underneath production data pipelines) and Fullstack Vanilla JavaScript (a framework-free full-stack JavaScript course showing what's possible with the platform alone).
Material is paid and aimed at intermediate-and-up Node.js developers ready to deepen their understanding of the runtime. For broader content, see CourseFlix's Node.js category page.