Cadence Design Systems Data Engineer interview questions

I was contacted by the recruiter on LinkedIn. After I shared my resume, I got an interview call nearly after a month and that too they never asked me my availability for the interview. Literally, 2 hours before the interview, I was asked are you free now to attend the interview and the recruiter told that they had forgot to send me the interview invite before hand. So, starting here itself I got some red flags regarding the process. Now the interview as such was good and went really well and I was told the recruiter would soon reach out regarding next steps. I waited for almost 3 weeks and never heard back again. Since then at least to have a conclusion to the process, I reached out to the recruiter multiple times over email and never got a response to the same. Worst interview experience I have had in my career ever.