Shopify Engineering

Shopify

@ShopifyEng

Making commerce better for everyone. Follow us for technical discussions and updates on how engineers build @Shopify.

Explore open roles: shopify.com/careers

Working Remotely shopify.engineering Joined May 2016

708 Following 61K Followers 5.1K Posts

Latest posts 5

Shopify Engineering @ShopifyEng 4d

We rebuilt our mobile apps in Swift and Kotlin with agents. To keep pace and hold our quality bar, we built Reflex: an agentic-first architecture that lets agents build and verify app behavior across iOS and Android without needing devices or simulators.

Here's how it works, piece by piece:
shopify.engineering/reflex

shopify.engineering Reflex: an architecture for building mobile apps with agents (2026) - Shopify Our architecture lets agents test mobile app behavior without an emulator and use one test suite to keep iOS and Android in sync.

Shopify Engineering @ShopifyEng Oct 26

Ok so our internal tools have ad campaigns now. 📷

We built Remote Dev so AI agents can build and test iOS and Android apps without maxing out engineers’ laptops. The engineering behind the ad:

shopify.engineering/remote-dev

shopify.engineering We gave AI agents a mobile dev environment (2026) - Shopify We built Remote Dev so AI agents can build and test apps in parallel, without maxing out developers’ laptops.

David Cortés @davebcn87 Oct 22

River, our Slack bot at Shopify, wasn't good at building mobile apps at first.

We fixed that, but engineers were still skeptical. Mobile development has always happened on your laptop, right?

So I made a series of internal ads for it. This is one of those:

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Shopify Engineering @ShopifyEng Oct 23

Sidekick’s frontier model hands its most token-heavy work to open models that Shopify post-trains and serves itself.

Check out the loop we use to build them, and where @NVIDIA’s models, software, and GPUs help to make each turn faster and cheaper.

shopify.engineering/open-model-tas…

shopify.engineering How Shopify turns open models into task experts (2026) - Shopify How we post-train and serve open models for Sidekick’s token-heavy work, with NVIDIA models, software, and GPUs making each iteration faster and cheaper.

Shopify Engineering @ShopifyEng Oct 20

Shopify's Catalog API helps AI agents recognize when different stores sell the same product.

But merchants name, describe, and photograph that same product differently. To categorize which product groups belong together, we created a system that turns billions of listings and trillions of candidate pairs into clustered listings under a shared product identifier.

Here’s how we built it: shopify.engineering/catalog-cluste…

shopify.engineering Cross-store product clustering across millions of stores (2026) - Shopify How Shopify groups product listings across millions of stores using tiered matching models, graph partitioning, and learned cluster merge decisions.

Shopify Engineering @ShopifyEng Oct 6

Thank you @wcandillon

Mustafa Ali Verified account @mustafa01ali Oct 6

As part of our commitment to a smooth transition for Shopify's React Native open source libraries, we've transferred ownership of React Native Skia to @wcandillon. We'll continue sponsoring its development through the end of the year.

Excited to see where he takes it next!
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