Shopify Replaces React Native with Swift and Kotlin via Coding Agents
Shopify is moving away from its 2020 React Native bet to rewrite its mobile applications in pure Swift and Kotlin. Autonomous coding agents have dramatically reduced the parity tax of building for both platforms, enabling the Shop app to ship natively in 12 weeks.
Why it matters
The traditional cross-platform tradeoff—sharing UI logic at the cost of native capabilities—is dissolving as LLMs make parallel native implementations economical.
TL;DR
- 01Shopify rebuilt the Shop app natively in Swift and Kotlin in 12 weeks using LLMs.
- 02Greenfield rewrites powered by checkpointing loops (Helix) proved superior to one-shot migration prompts.
- 03FlashList will be transitioned to new corporate stewards while receiving critical compatibility fixes.
The Shift Away from Bridge Frameworks
Shopify has reversed its five-year bet on React Native, moving its primary mobile apps back to native Swift and Kotlin. The company found that coding agents fundamentally broke the assumption that building for two platforms requires double the work. Agents reliably translate logic between platforms, reference iOS versions to construct Android counterparts, and dramatically reduce the effort needed to maintain platform parity.
Why One-Shot Prompting Failed
Attempting to convert codebases in bulk produced unmaintainable code. To solve this, Shopify built an agent loop called Helix. Helix digests existing React Native components and generates a sequence of granular checkpoints. Each slice must fulfill strict conditions before commit:
- Pass automated behavior tests
- Match the running UI in visual diff reviews
- Pass two automated adversarial code review steps
- Receive explicit human engineer sign-off
Open Source Transition Roadmap
The migration impacts widely adopted mobile libraries:
FlashList: Currently generating ~2M weekly downloads, Shopify will maintain compatibility patches while actively discussing long-term stewardship with several external companies.Restyle: The styling library will receive maintenance through the end of 2026, after which Shopify will archive the repository.