Richard Schneeman is a US software engineer (formerly at Heroku and Salesforce) and one of the most-cited independent voices on the open-source contribution craft — particularly around the Ruby on Rails ecosystem where he is a long-running core contributor.
His CourseFlix listing carries How to Open Source — The Missing Open Source Handbook — a structured treatment of the open-source contribution path from finding projects through becoming a recognised contributor, drawn from Richard's decade-plus of work in the Ruby and Rails communities.
Material is paid and aimed at engineers ready to make open-source contribution a deliberate part of their career. For broader content, see CourseFlix's Career & Interviews category page.