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Distributed Systems for Fintech
Section 5 of 9
Message queues, event-driven payment flows, circuit breakers, distributed tracing, exactly-once processing, and chaos engineering for payment systems
4 hours•advanced
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Key Takeaways
- •The Saga pattern replaces 2PC for distributed payment transactions — use choreography for simple flows, orchestration for complex ones
- •Circuit breakers prevent cascading failures when a payment processor goes down
- •Exactly-once processing = idempotent consumer + deduplication ID + transactional outbox pattern
- •Distributed tracing across Lambda → SQS → DynamoDB requires trace context propagation in message headers
- •Chaos engineering should simulate processor timeouts and partial failures — not just full outages
📝Personal Notes
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