Pragmatic Studio is a US-based teaching company founded by Mike Clark and Nicole Clark — both long-running Ruby and Elixir educators. The studio publishes paid courses on the Ruby on Rails, Elixir, and Phoenix tracks at the level of comprehensive working-engineer reference material rather than introductory tutorials.
The CourseFlix listing carries six Pragmatic Studio courses spanning their full curriculum: Ruby Programming, Ruby on Rails 6, Ruby on Rails 7, Developing With Elixir/OTP, Full-Stack Phoenix, and Full-Stack GraphQL with Absinthe, Phoenix, and React. The teaching style is patient, project-oriented, and unusually rigorous about the foundational language and framework patterns.
Material is paid and aimed at developers building production proficiency with the Ruby and Elixir ecosystems. For broader content, see CourseFlix's Ruby on Rails, Elixir, and Phoenix category pages.