Feature Toggles: Dynamic Configuration at Wirex
summary
A case study of how Wirex implemented feature toggles: starting from a simple config-file kill-switch for maintenance to a rules-driven system with prioritized, granular targeting (country, state, individual user). Covers storage and management evolution (DB editing → admin UI → automated, event-triggered changes) and introduces “actions” — combining feature toggles with business rules to drive a dynamic client interface based on available user actions.
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