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89. Design a Donations Website for a Charity Event
Ten charities, three days, $100 M: charge through a third-party processor exactly once, queue the broadcast spikes, keep live totals on sharded counters. One-hour boards for junior, senior and staff, with the theory behind them.
ClassicMedium
Sharding Queues Databases
+6
Distributed systems AWS DynamoDB Idempotency Payments Reconciliation
Worked design
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