Strong no hire for Staff+ signal from this post.

Meta's leetcode gambit includes leetcode Hards and Mediums which aren't just "remember your hash maps and trees!" They're incredibly hard to brute force under time pressure if you haven't practiced similar problems before. Now do that for every interview -- exhausting.

Alternative? Lol? System design. "Walk me through systems you've built." Have a conversation. If you can't then maybe you don't have the skill for interviewing or dare I say the skill to be an engineer.