Note: This is an opinionated guide. While it is most effective for on-site, the same pattern can work with remote candidates.
How To Interview Engineers
Interviewing is hard. It's not easy to find good people, and once you do, it's often difficult to find out what they can do and how they work. A badly-run interview can pass over a great engineer. Conversely, some engineers are good at passing traditional tech interviews, but bring major problems with work habits or team fit.
The first priority of any manager is to hire the best people. Everything else must wait.