Bloomberg Senior Research Engineer interview questions

2 coding rounds then virtual onsite. First 2 rounds including one coding leetcode style, and one LLM knowledge round. 1st round of virtual onsite is not quite related to ML, but a question about aggregate model evaluation metrics. It is hard for me to understand what the interviewer is trying to ask. Also follow up with quite some system level questions related with backend or Kafka, which doesn't seem to related to the RE role at all.