Salesforce backend round, one big system design question about elevators. Felt like a classic OOP design problem but with enough scheduling complexity to keep you on your toes for the full hour.
“Spent the first few minutes just listing classes out loud, ElevatorCar, FloorRequest, Dispatcher, Door, that kind of thing.” The rest of the author's notes on Backend Engineer interview at Salesforce, Onsite - System Design / Architecture round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.