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Coinbase Interview Question Bank

Coinbase runs a long, gated pipeline — AI recruiter screen, a cognitive aptitude test, a culture/personality questionnaire, and a CodeSignal coding OA all precede the recruiter call, and team match still happens before the 4-round VO. Coding rounds bias toward multi-level CodeSignal-style problems (banking system, in-memory database, mining-block knapsack, crypto order management) over canonical LeetCode; bring your own scaffolding because interviewers often hand you a blank file with no class structure or tests. AI-assisted coding is now an explicit round on its own.

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Coding·70 min
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Banking System (Multi-Level OA)

Four-level CodeSignal OA: implement a small bank backend that grows from basic account operations to spending leaderboards, scheduled / cancellable payments, and account merges that preserve history. The volume of code is the difficulty; each level is straightforward in isolation but few finish all four in 70 minutes without prior practice.

SWE
hashmap
heap
data-structure
object-design
+3
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