Kristiyan Velkov is a software engineer and React educator focused on the technical-interview prep specific to React — particularly the kinds of React-deep-knowledge questions that gate senior front-end engineering roles at large tech companies.
His CourseFlix listing carries two Kristiyan Velkov courses: Mastering React.js Interviews — From 0 to Hero and Mastering React.js Interviews — For Middle/Senior Developers. Together they cover the React-specific interview curriculum from junior level through senior, including the React internals (reconciliation, fiber architecture, hooks rules) that show up in deep technical interviews.
Material is paid and aimed at React developers preparing for technical interviews. For broader content, see CourseFlix's React.js and Preparing for an interview category pages.
