Payment System
hardOpen designVery commonly asked~45 minHLD roundBar raiserSenior / SDE-3RazorpayPhonePeAmazonFlipkartUberConsistency & ConsensusResilienceQueues & Async
The question, as asked
“Design the payments service. Money moves from a customer to a merchant, and nothing can be lost or double-charged.”
Your answer, first
Commit something before anything unlocks. Saved on this device as you go.
0 charactersExpand for room to draw
Full drill coming soon
This one is listed because it comes up constantly — the three-depth answer, follow-ups and red flags are being written. Attempt it above anyway; that part works, and the guides below cover the ground the drill will.