ProgrammingExpert.io (also known as the broader AlgoExpert family) is a US technical-interview-preparation platform run by Clément Mihailescu and team — focused on the algorithm / data-structure / system-design content that gates engineering roles at large tech companies.
The CourseFlix listing carries Object-Oriented Programming from ProgrammingExpert. Material is paid and aimed at developers preparing for technical interviews or shoring up CS fundamentals.
