[niclo]

I don't think you can call it mind-expanding or intellectually stimulating, but I'm currently following the MOOC about modern Web Development from the University of Helsinki https://fullstackopen.com/.

I think it's quite solid and valuable, has a good amount of exercises and I really like the frameworks/technologies they teach (React/Express/TypeScript/GraphQL).

Also trying to expand on my own the topics and concepts they introduce, so I think at the end it's gonna be a very good long-time investment.

For more specific stuff like Algorithms and Data Structures or Programming Languages knowledge, I usually prefer books over MOOCs.