For experienced hires, we'll do deep dives on technical projects that they've worked on. Sometimes, I'll frame these as "Suppose I'm a new member joining that team. Bring me up to speed." These interviews focus on whether the candidate can clearly articulate concepts, explain the big-picture motivations, defend decisions they've made, understand complex technical problems, and stay humble and share lessons learned.
For manager interviews, we'll also do interviews that are one-on-ones with engineers on actual issues that they're facing.