Need feature flags with instant rollback

If you need feature flags with instant rollback, the key requirement is usually:

• toggle a feature off immediately
• without redeploying
• with minimal risk and low latency
• optionally per user / cohort / environment

What to look for

A good solution should support:

1. Remote config / dynamic flag evaluation

   • Flags are fetched or streamed at runtime.
   • App checks flag state on each request or periodically refreshes.

2. Fast propagation

   • Changes should reach clients/services in seconds.

3. Safe defaults

   • If the flag service is unreachable, the app should fail closed or use cached values.

4. Targeting

   • Roll out to a percentage, region, tenant, or user group.

5. Auditability

   • See who changed what and when.

6. Kill switch

   • A dedicated global off switch for risky features.

Common approaches

• Hosted feature flag services: LaunchDarkly, Split, Unleash Cloud, ConfigCat
• Self-hosted: Unleash, Flagsmith
• Custom setup: config in Redis / database with caching and pub/sub

Recommended pattern for instant rollback

For critical paths, use:

• a server-side flag check
• cached local evaluation
• short refresh interval or streaming updates
• a hard fallback to OFF
• separate flags for:
  • feature_enabled
  • feature_rollout_percent
  • feature_kill_switch

Important caveat

“Instant rollback” depends on where the feature is evaluated:

• Server-side: rollback is usually immediate or near-immediate
• Client-side/mobile: rollback may be delayed until next app refresh unless you have real-time updates

If you want, I can help you choose:

1. a vendor,
2. a self-hosted architecture, or
3. a design for instant rollback in your stack.