The hiring process at Capital One takes an average of 90 days when considering 1 user submitted interviews across all job titles. Candidates applying for Senior AI Engineer had the quickest hiring process (on average 90 days), whereas Senior AI Engineer roles had the slowest hiring process (on average 90 days).
I applied online. I interviewed at Capital One (Boston, MA) in May 2026
Interview
Online assessment (a little data analysis, math), recruiter phone call (test for fit), mini case interview (1 hour with a PM walking through a C1 related product), PowerDay (4 back to back 1 hour cases) - product you worked on before, 2 math heavy cases, a open ended case where you prioritize what problem to solve first and how to solve it
Interview questions [1]
Question 1
Discuss results of an A/B test. Which test is worth pursuing.
There will be 4 rounds of interviews.. 2 Technical, 1 Behavioral and 1 Case Tech.
Technical Stack A
Code challenge using Code signal Platform and you will share your screen.
Has 3 levels and divide an hour time so that you can complete all 3 levels.
Technical Stack B
Code Signal white board where you will share your screen
Design 3 tier architecture which should look robust.
Depict scalability, resiliency, design tradeoffs in the architecture.
Behavioural Interview
Follow STAR method - Situation, Task, Action and Result.
Frame concrete examples depciting comptencies and around your professional life
Answer using I statement rather than “We” in any recent or past projects
Panelists look for impact on the organization and reprioritization in the example provided.
Case Tech interview
Divided in 2 parts: Technical problem solving and Quantitative analysis.
It is recommended to keep checking in with the panelists to keep going in the right direction.
Interview questions [1]
Question 1
There will be 4 rounds of interviews.. 2 Technical, 1 Behavioral and 1 Case Tech.
Technical Stack A
Code challenge using Code signal Platform and you will share your screen.
Has 3 levels and divide an hour time so that you can complete all 3 levels.
Technical Stack B
Code Signal white board where you will share your screen
Design 3 tier architecture which should look robust.
Depict scalability, resiliency, design tradeoffs in the architecture.
Behavioural Interview
Follow STAR method - Situation, Task, Action and Result.
Frame concrete examples depciting comptencies and around your professional life
Answer using I statement rather than “We” in any recent or past projects
Panelists look for impact on the organization and reprioritization in the example provided.
Case Tech interview
Divided in 2 parts: Technical problem solving and Quantitative analysis.
It is recommended to keep checking in with the panelists to keep going in the right direction.
Code assessment then to power day interview with 4 rounds. Overall the power day interviews were okay except for the case study. The interviewer was disengage while being on their phone the whole time. There was a part where the interviewer said fix the mistakes then went back to their phone. I pointed out their code has other errors with template and was ignored. Then while attempting to fix those (10 mins later) they mentioned to ignore that part and focus on the very bottom part of the code. What a waste of time and very unprofessional. This makes me wager a few of the interviewers probably could not pass their own interview process today.
Interview questions [1]
Question 1
Code signal 4 questions. Power day is one coding question, system design, case study and behavioral.