Element Senior Software Engineer, Machine Learning interview questions

Was approached by an external recruiter. The entire process took around 8 or 9 phone calls. Had an interview round with each of the 5 research engineers who asked coding, ML theory questions or general past experience. There was a talk session where I presented my past research work. A couple of other behavioral rounds with the HR and CEO. Apart from that, there were multiple phone calls with the CTO, including a screening round.