System Design: Background Job-Processing Workers! Basic application setups fail when executing long-running tasks like email delivery sequentially inside the user request loop. Slow downstream services cause high latency, while API timeouts trigger immediate request failures for the end user. Never risk data drift by pushing straight to a message queue after a database save, because a crash between those two actions drops the task completely. Instead, implement the Transactional Outbox pattern t

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A volunteer coalition of metro riders called Enforce the Fares says the biggest safety problem on L.A.'s buses and trains isn't a shortage of security officers, it's that almost no one checks whether you paid. Metro, the agency that runs most buses and light rail in L.A. County, says it's tackling fare evasion in a different way. Both sides want a safer system. The question is which approach actually works. @tom spoke with both groups and brings you this deep dive. If it were up to you, what wou