Feature Flags and Progressive Delivery

Purpose

Feature flags (also known as feature toggles) are a core BigTech practice that enables:

• Trunk-based development without breaking production
• Canary releases and gradual rollouts
• A/B testing and experimentation
• Kill switches for instant production rollbacks
• User targeting for beta features

Google, Netflix, Meta, and Amazon all use feature flags extensively to achieve continuous deployment with minimal risk.

Features