I also started my post-university career with their 2 Java MOOCs, 5 years ago. One of the best courses I have done to this day.

Also particularly good from a Finnish university, but for Full-stack Javascript Development (Node + React) is https://fullstackopen.com/en/.

The Java MOOC's assessments are auto evaluated.

The FullStackOpen's assessments are uploaded into Github and actually evaluated by humans for free.

Both give out certifications without payment upon completion.