It was a very nice experience - actually better than most other places I interviewed. They sent some academic research papers for review and then disucussed details about the paper - mostly how well I could understand the key concepts and whether I could find out the key assumptions and possible flaws in the assumptions.

Walk through resume, and a LLM related take-home task, need to be familiar with NLP and LLMs. Standard quant interview questions, and you need to complete the task well and be able to walk through it.