Feature Flags in Production: Risk-Free Releases with OpenFeature and Progressive Rollouts

Learn to separate deployment from feature activation with feature flags: the four flag types and their lifecycle, the OpenFeature (CNCF) standard to avoid vendor lock-in, progressive rollouts with deterministic bucketing, kill switches and how to avoid flag debt. Expanded edition: evaluation architecture (in-process vs remote), flagd and flags as GitOps, evaluation context design and PII, rings and guardrail metrics, A/B experiments with SRM checks, React flags without flicker, testing with in-memory providers, observability with OpenTelemetry, resilience when the flag backend goes down, governance and expiry in CI, mobile and edge, migrating to OpenFeature, a complete case study, a production checklist and an FAQ. With production-ready code in Python and TypeScript.

37 minutes read

Josue Puig

2026-07-24

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