Weights & Biases interview questions

The most unprofessional, mess of an interview experience I've ever had. Was asked to proceed in the interview process after the initial meeting with the CoS, for an EBP role. Was asked to proceed in process and to provide my availability and complete a take-home assessment assignment within the next 3 days. Spent a few hour of a gorgeous Saturday completing and submitting the assignment, and sent in my availability. After about 4 days and no confirmation that my submissions had even been received, I reached out to the CoS. Was ghosted. After another week, I thought perhaps something was seriously wrong, so I sent an email to the founder. (I'd be supporting them along with the team). I've never done this before, but I thought I'd reach out just in case the CoS took deathly ill, or had abruptly left the company. Nothing. Absolutely. Nothing. Not so much as a 'no-reply' automated email. It's been over a month now, so safe to say I dodged a bullet. If this is the way they treat a candidate, I can only imagine how they treat their employees.

First a recruiter call followed by a call with the hiring manager. Then a series of coding interviews (CoderPad with LeetCode style questions) and system design interviews. The first coding challenge (screening) is relatively easy but their criteria is inconsistent and unclear. Even completion of an efficient solution with communication of trade offs and different approaches may not be enough.