Andela Software Engineer interview experience

The prompt was very concrete: it was basically a consume-door-events handler. I had to model a door that starts closed, with a single remote button that toggles opening and closing, a five-second movement window, and pauses/resumes when the button is pressed during motion.

The hardest part was adding the safety behavior for obstacle detection. The door had to immediately reverse direction when an obstacle was detected, based on an input string where each character represented one second—'.' for no event, 'P' for a button press, and 'O' for an obstacle. The flow was very test-driven and