System design
Capital One System Design Questions
Every system design problem candidates reported at Capital One between September 2025 and September 2026, most-asked first. Each one links to a full solution. Tick them off as you go.
Practice a Capital One system design round with me
I'm Alex. I'll pick one of these Capital One questions and interview you on it: scope, design, and deep dives.
Companies
Meta26
Microsoft24
Amazon23
OpenAI22
Google20
TikTok16
Salesforce15
Uber12
LinkedIn11
Apple11
JPMorgan11
Atlassian11
Snowflake9
Netflix9
Oracle9
Goldman Sachs8
Rippling8
Walmart7
NVIDIA6
Pinterest6
Roblox6
Flipkart4
Bloomberg4
Visa4
Adobe4
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+5Duplicate reports of the same problem are merged and counted.
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What system design questions does Capital One ask?
Candidates reported 7 distinct system design problems at Capital One between September 2025 and September 2026, including Design a geography-aware virtual card service, Design Credit-Card Authorization, Limit Decisions, and Reporting, Design a credit card portal.
How to prepare for Capital One system design interview?
Start with the Capital One problems reported most often, work through each full solution, then practice explaining a design end to end under time pressure in a mock interview.
What is the difference between HLD and LLD at Capital One?
HLD (High-Level Design) focuses on system architecture, scalability, and component interactions. LLD (Low-Level Design) dives into class diagrams, API contracts, and database schemas. Capital One tests both.