Shared Redis cache: reloads from 12.4 s to 0.64 s
Designed and shipped a shared Redis caching layer for the SCM 2.0 backend: 12 caches with 5 to 60 minute expiry and versioned keys, shared across workers, with simultaneous requests for the same data merged into one query.
Validated against an environment without Redis on two separate dates, with an uncached control endpoint (1.34 s vs 1.42 s) to show the gain comes from caching, not the environment. Released to QA on 11 Nov 2026 with no Redis warnings, no server errors, and all 33 SCM 2.0 pages passing regression.