TL;DR: I should have looked at the Glassdoor reviews before picking up the phone, don't waste your time here - many red flags about their culture.
• Technical sourcer reached out to me for a role that sounded great (job description was for a specific role; written to be very inclusive and right up my alley and skillset).
• Technical sourcer was slow to reply, finally scheduled a recruiter call.
• Recruiter said she got double-booked and rescheduled the day before.
• Recruiter was late to the call, and didn't apologize or acknowledge.
• Recruiter was disorganized when on the call: asked what my background was even though she was looking at my resume or LinkedIn, said they weren't looking for non-traditional backgrounds. Had an extremely haughty and dismissive attitude around my abilities (I declined to mention that I have previously had a FAANG offer.) Asked what role I applied for (hello, your technical sourcer is the one that reached out - I didn't apply to anything.)
• Recruiter then said they'd be happy to do a technical interview anyway, which they outsource to a third-party company. Ghosted anyway.
From this and other reviews, seems like the technical sourcer and recruiters aren't aligned at all and are fairly disorganized. It also seems like the engineers there only care about finding people who wipe themselves with red-black trees in the morning, regardless of any other applicable skills, and have enough of a better-than-thou attitude that they can't be bothered to interview the people that they'd work with day-to-day.
Like hires like - maybe 300 Leetcode hard problems are really relevant to their day-to-day job. Maybe they're secretly a thinktank for solving P vs. NP. But overall, I'd avoid unless that's the kind of culture you're looking for, or love wasting your time.