IMHO data eng is too niche and new for that kind of content. But I would love to see if there is anything out there like that.
Is the goal here to get through system design interviews or something like that? You can check out pramp.com if so.
If it’s for learning, then reading some of the original Google papers behind a lot of the big data technologies has been very rewarding for me.
You could try reimplementing the paxos algorithm for example.