Shopify's Epic React Native New Architecture Migration
Shopify successfully migrated its massive Shopify Mobile and Shopify POS apps to React Native's New Architecture while maintaining weekly releases and serving millions of merchants. This involved a complex codebase, hundreds of screens and native modules, extensive custom components, and deep integration with first-party libraries like FlashList. The post details their migration strategy, key decisions, and lessons learned, including maintaining development velocity, dual architecture compatibility, and performance/stability parity. Common migration issues like state batching, blank screens, shadow tree manipulation, and view flattening are addressed. The migration resulted in improved app launch times and valuable contributions back to the React Native community.