Capital One power day, the virtual card case ate me alive
Capital One power day, the virtual card case ate me alive
Did my Capital One power day this week, 4 rounds split over two days. 6 YOE backend at a fintech so I figured this was my home turf. lol.
Day one was the case and behavioral. The case was the virtual card number one. Pros and cons first, fine. Then they gave me rules for what each digit means and which payments are valid per network, and I had to walk through a list of transactions out loud. Last part was debugging their implementation of those rules and the code was rough. Mixed up and/or, an off by one on the amount check, and the way it pulled digits out of the card number made no sense. Found most of it but rambled, never got to the OOD part.
BQ was normal plus two questions about how I use AI at work. I said I treat it like an intern and review everything, interviewer seemed fine with that.
Day two was the banking system coding (create account, deposit, transfer, then top N by activity) and credit card system design. Coding went ok but writing my own little test harness took longer than the actual code. SD I went too deep on fraud checks too early and kinda ran out of time for the credit report part.
Recruiter said about a week. Honestly could go either way. Anyone hear back fast after a messy case round?
Replies (5)
the debugging part of that case had me second guessing myself too, you're not alone
did they let you pick what to deep dive in SD or did the interviewer drive it? mine kept steering me toward the queue stuff
mostly me picking, which is how I ended up in fraud land for 20 min. should've just laid out everything first
what did you count as activity for top N, number of ops or money moved? I asked and they said either was fine as long as I said which
took about 6 business days for me last spring. one rough round didn't sink me, they seemed to look at the whole day
ok that actually helps, thanks
good luck man, fingers crossed