← Back to Coinbase
2
Implement a Blockchain Transaction Tracker
CodinghardCommon
blockchaintransaction-monitoringchain-reorg
Reported
7 times
Last seen
2026-03-18
First seen
2025-07-20
Active in
2025, 2026
Description
Build a service that monitors blockchain transactions, detects confirmations, and handles chain reorganizations.
Approach Tips
Track confirmations by monitoring block depth. Discuss how to detect and handle chain reorgs (re-process affected transactions).
Sources
Blind·SDE-3·2026-03-18
Glassdoor·Senior·2025-11-22
CB
Coinbase
Crypto/Fintech
Typically appears in: Phone Screen
60 min — Algorithmic coding problem. Focus on data structures and problem-solving.