I applied through a recruiter. The process took 1+ week. I interviewed at Capital One (Richmond, VA) in May 2025
Interview
They require you to complete a LeetCode-style coding assessment, which can be quite challenging. You really need to study and practice in advance, since it’s not something you usually gain through regular work experience. Most of the problems are algorithm-focused and test your problem-solving skills under time pressure.
Interview questions [1]
Question 1
Can you implement a function to find the longest substring without repeating characters?
Interviewed for an engineer position, the interview was a joke. Asked basic OOP question with a few follow ups - no system design portion. Interviewer was very laid back and chill, didn't take it to seriously.
Was not too difficult. three total interviews all on the same day back to back. technical one, behavioral one and a case which was more of just a debugging question
Expecting a challenging experience, I found the interview at Capital One to be intense, particularly during the system design section. The question on designing a rate limiter with a token bucket algorithm took me by surprise; mid-way through the problem, I realized it was very similar to a drill I’d practiced on prachub.com just days earlier. The technical rounds included several DSA questions, and the interviewers were thorough but supportive. Ultimately, I received an offer and happily accepted, feeling well-prepared despite the pressure.
Interview questions [1]
Question 1
Design a rate limiter using a token bucket algorithm and discuss how it would handle bursty traffic and distributed deployments.