I had a great experience working with recruiters from Datadog.

First, I had a recruiter call, in which they explained the process thoroughly. Then, I had a pretty standard tech screen consisting of fair questions. After passing that, they sent me a take-home assignment, which is something you might do in the real world.

Something that sets Datadog apart from other companies is that they seem to care about each candidate and take the time and care to describe exactly what went well and what didn't go well during each portion of the process. Other companies should take a page out of their book in this regard.

Study your algorithms and data structures, which are typical interview topics.