hard one the whole process not clear and the asking not related question, mainly the focus was on system design question as well at backend architecture and etc etc etc etc

I heard back around a week after applying. Spoke to talent acquisition who said they would set up a meeting with a member of the team. I asked what kind of interview it would be (live programming, tech interview, culture fit interview, etc) and was explicitly told that it was not an interview but simply an "informal chat" before the interview stage. This was also put in writing on the email invite. Lo and behold it was an incredibly tech heavy interview where the interviewer asked me in depth, low level questions about libraries I had used before. Even when I explained the best I could and said that was the limit of my knowledge on a specific library, and tried to explain how and why I used the library to move things along, he kept pushing and going back to asking me how the library worked. Went in circles for a while. I knew it went poorly and I knew it would be a rejection, but I was told they would be in touch regardless. Over a month later, talent acquisition emailed to say they were still going over applicants and would get back to me soon. I never heard back again. Poor communication from start to finish