Khalil Stemmler is a Canadian software engineer (formerly developer-advocate at Apollo GraphQL) and a long-running independent voice on Domain-Driven Design, TypeScript, and the architectural patterns underneath production Node.js applications. He runs khalilstemmler.com and the Software Essentialist teaching platform.
His CourseFlix listing carries Software Essentialist. Material is paid and aimed at engineers ready to think about software design at the level of architecture and modeling rather than at the level of frameworks and syntax.