// ENGINEERING CASE STUDIES
A closer look at individual debugging, architecture, performance, and delivery tasks—the decisions that changed the outcome and the evidence used to check the work.
Performance & caching
An 8,925-product crawl took 486 seconds, while CDN cache identity collapsed every shard. I bounded generation and made each regional shard independently cacheable.
Read case studyWorkflow architecture
A 13.4-second provisioning call outlived the browser's roughly 10-second gateway. I moved that work behind an explicit asynchronous handoff.
Read case studyDistributed systems & security
Three backend replicas split a five-attempt counter. I replaced per-instance state with shared, concurrency-safe counters without adding a new service.
Read case studyIncident diagnosis
A customer record existed despite the reCAPTCHA error. I traced the real failure to environment configuration and stopped a rollback that could corrupt successful work.
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