Chris Sev is a US developer and educator focused on practical front-end tutorials — particularly Tailwind CSS and the project-based React work that builds working applications fast.
His CourseFlix listing carries two Chris Sev courses: Beginner Tailwind (one of the canonical introductory Tailwind CSS courses) and Make 20 React Apps (a project-based React curriculum built around shipping 20 small finished applications rather than working through abstract tutorials).
Material is paid and aimed at intermediate web developers picking up Tailwind or building React fluency through volume practice. For broader content, see CourseFlix's CSS and React.js category pages.