Coinbase Coding Interview Questions
28 Coinbase coding interview problems with full optimal solutions — 16 easy, 9 medium, 3 hard. Every problem ships with multiple approaches (brute-force first, then the optimal), complexity tables for each, company-specific tips on what an Coinbase interviewer values, and a FAQ section.
Showing 3 problems of 28
- #23hardfoundational
23. Sliding Window Maximum
Extract the peak price across every k-candle trading window in O(n) — Coinbase uses this problem to stress-test whether you can maintain a monotonic deque instead of repeatedly scanning a window when computing rolling highs on order-book snapshots.
- #24hardfoundational
24. Trapping Rain Water
Calculate total liquidity trapped between price-bar barriers — Coinbase uses this classic to evaluate whether engineers can reason about prefix/suffix maximums and then collapse the solution to a two-pointer scan without extra arrays.
- #28hardfoundational
28. Find Median from Data Stream
Maintain the real-time median bid price as orders stream in — Coinbase uses this dual-heap problem to test whether engineers can design O(log n) insert / O(1) median structures for continuous market-data feeds.
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