Complexio Senior Design Engineer interview questions

Most unprofessional interview experience I've encountered. The recruiter was struggling with his connection (it happens) and offered to reschedule, which was totally fine for me. Despite following up, no rescheduling ever happened. The call was also made via Whatsapp (very odd) and with major delay on their end. It's a shame, as I was actually interested in the role and might've been a fit.