The interview process begins with two introductory calls, followed by a set of three interviews: a basic technical interview, a culture interview, and an infrastructure interview.

The three interviews are not reviewed until after all have been completed. This can mean they may decide they aren't interested after the first interview but will proceed to waste two additional hours of your time.

Afterward, they will ask if you want feedback; don't bother, as it's typically a form letter response stating they "chose someone else."

This company also expects employees to wear multiple hats, so be warned if you do interview.

Given this piece of code, how would you optimize this system? Then, draw a diagram illustrating how the infrastructure would work.