I applied from the job portal and the recruiter approached me setting up a first call. We had a first call and I was having a very positive image. After the first call, he sent me a take-home task (a machine learning time series task), I worked on that task and sent the task back to the recruiter within the proposed timeframe. After that, I was completely ghosted. I sent multiple emails and after three weeks, recruiter sent an email that you are not a good fit. I asked for feedback and there was no response at all. Thanks for wasting four weeks and without any followup. Really bad and negative experience so far.