I've gone through a few compiler courses over the summer and this is among the best resources I've found (UPenn, CMU & Siek's "Essentials of Compilation"). It has a unique approach among them, it is the first lecture series that assumes a modern approach, that is, it ties compiler frontend to developer experience and IDE.
Highly recommended to anyone who wants to deepen their knowledge about compilers and/or make their own language IDE/LSP friendly.