Bloomberg Sr Software Engineer interview questions

Applied online, then had usual HR screen screening and several remote interviews. I applied for 3 roles, but you can only interview for 2 simultaneously, which I did. First were two online coding rounds. Not too hard, roughly Leetcode medium, but be sure you can tell the big-O complexity of algorithms and containers you are using, they will ask. Then I had a system design interview with one of the teams which a failed. A typical system design problem, but I never had this kind of interview and was very rusty on db-centric apps. I asked for a couple of weeks to prepare before doing one for the second team. They agreed, but ran me through another live coding interview before the second system design one. The coding was another Leetcode medium which I think went OK-ish, but the system design was not what I expected. They presented a slide with their real system and asked questions around it. I think I gave OK-ish answers and the vibe was good, but still got a rejection email same day. What was disappointing is that someone with finance trading/experience would clearly have a significant advantage with such a design problem. Since they don't even mention finance experience in job ads, I felt it was unfair. So anyone interviewing should take time to learn about the team and system design problems relevant to their work. Recruiter communication could be improved also, they did not make it clear which interviews are scheduled on site, did not respond to my email feedback request.