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Product Engineering

Feature Rollout & Config-Driven UI

Feature FlagsBackend ConfigSaaSState Management

Problem

Features were tightly coupled to deploys. No way to gradually expose functionality, test in production with a subset of merchants, or instantly disable a broken feature without a hotfix.

Ownership

Designed the frontend state model that consumes backend configuration. Built the gating logic. Collaborated with backend engineers on configuration class structure.

Architecture

Backend configuration classes define feature states, rollout percentages, and merchant-level overrides. The frontend consumes these through a shared state layer. Components subscribe to feature gates declaratively. The same state model drives both merchant UI and internal admin tools.

Highlights

  • Shared state model consumed by both merchant UI and admin tools
  • Backend config classes control field visibility, feature access, and rollout scope
  • Declarative feature gating at the component level
  • Percentage-based and merchant-level rollout targeting

Deployment

Feature gates deployed as configuration changes, not code changes. New features ship dark-launched and activate through admin interface.

Impact

Decoupled deploys from releases entirely. Product managers control rollout scope without engineering. Instant kill-switch capability for any merchant-facing feature.

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