Hi LetGo, this is my coding exercise solution.

I've used Akka HTTP, as that's what you guys use. Not much prior experience with Akka. Used Spray for JSON handling and found a library to access the Twitter API.

As for architecture - there's very little of it. I strive not to overarchitect small projects. As most of the code is boilerplate and there's very little business logic, there's exactly one tiny unit test.

It took me the longest time to figure out that I can't serialize custom exceptions. I still don't have an idea how to make the serialization work for subclasses.

When a request comes in, pressing Enter does not stop everything. It stops the web server, but some other stuff is running. Perhaps I'm not enough of a perfectionist, I just let that go.

Yes, way too long. Akka feels tricky to debug. Probably 6-7 hours? I could've done it a lot faster, but I also could've spent 20 hours dealing with the issues described above. Perhaps this is a good compromise.