Shopify leaves React Native for native code

Shopify reversed its six-year bet on React Native on September 10 and is moving to fully native apps instead. Six engineers rebuilt the Shop app as a fully native app and got it into both app stores in 12 weeks. The main Shopify app, with more than 300 screens, moves next, followed by Point of Sale and Inbox.

Engineer Mustafa Ali wrote in a Shopify Engineering post that "LLMs changed one of the core assumptions behind our 2020 decision." That assumption held that writing an app twice, in Swift and in Kotlin, doubled the engineering cost. Sharing one codebase, bridge overhead included, made sense because code was the expensive part. Shopify says coding agents changed that math.

The system built for the migration, called Helix, breaks the port into small checkpoints. Each checkpoint has to clear four gates before it counts. Those are automated tests, a visual diff against the live app, two adversarial agent reviewers arguing against each other, and a human sign-off. No agent's own report moves anything forward by itself.

The visual diff gate is the one I'd trust most. Every port I've watched go wrong went wrong in the pixels, not the tests. Padding shifts two points. A transition drops a frame. A disabled state loses its contrast. A screenshot diff against the live app catches that before a reviewer has to spot it by eye.

The Hacker News discussion ran to 804 comments, and the skeptics raise a fair point. Shopify had six strong engineers and custom internal tooling, and coding agents made the typing cheap. Keeping two native codebases in sync for years is a different cost. Nobody's tracked whether it beats the bridge over that kind of timeline. I don't know if the maintenance math holds the way the build math did.