Design for Reliability, Not Just Speed
Ensure that repeating an action does not create duplicates or corruption. Pair idempotent operations with backoff retries and dead-letter queues. A billing automation stopped double-charging customers simply by tagging transactions with unique request identifiers and verifying state before posting.
Design for Reliability, Not Just Speed
Log meaningfully, trace across services, and make failures loud in the right channels. Dashboards should show throughput, error rates, and latency. A small alert tuned to a tolerated threshold saved a team from a silent slow-down that would have cost a week of rework.