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by fn1 1641 days ago
* Use an IDE (Like IntelliJ Idea)

* If there's no architecture-document that gives a short (3-5) page overview on the layout of the code then start writing one.

* Skim through the folders / packages / classes and write down a few obvious questions that pop into your mind while "speedreading" the code.

* Try to make an improvement to see how the whole CI/CD process works.

* Look through the list of direct dependencies / libraries and see where they are used.