Autoresearch isn’t just for training models (2026) - Shopify
Autoresearch isn’t just for training modelsTobi and I generalized Karpathy’s Autoresearch to improve 40+ metrics across Shopify, then we open-sourced our project. It is 7PM and I'm still at my desk. My branch just failed CI. Again. It's the fifth time in a row. I am about to close my laptop and give up. What I don't know yet is that days later, Tobi will send me a 32-commit pull request to my auto
MCP UI: Breaking the text wall with interactive components (2025) - Shopify
MCP UI: Breaking the text wall with interactive componentsMCP UI extends the Model Context Protocol to enable AI agents to return fully interactive UI components. It solves the critical challenge that commerce experiences require visual and interactive elements like product selectors, image galleries, and cart flows. This open-source protocol allows agents to embed commerce components while mainta
Five years of React Native at Shopify (2025) - Shopify
Five years ago, we announced that React Native (RN) is the future of mobile at Shopify. Today, we are excited to share the progress we've made, lessons learned, and what the future holds. To recap, we decided to switch to RN for 3 main reasons: Write it once - Stop building the same features twice, once on iOS and once on Android Talent portability - Enable devs to work fluently across iOS, Androi
Caching Without Marshal Part 2: The Path to MessagePack - Shopify
Caching Without Marshal Part 2: The Path to MessagePackShopify wanted a cache format that would not blow up when we shipped code changes. Part two of Caching Without Marshal describes the MessagePack format, and how we migrated to MessagePack. In part one of Caching Without Marshal, we dove into the internals of Marshal, Ruby’s built-in binary serialization format. Marshal is the black box that Ra
Caching Without Marshal Part 1: Marshal from the Inside Out - Shopify
Caching Without Marshal Part 1: Marshal from the Inside OutShopify wanted a cache format that would not blow up when we shipped code changes. Part one of Caching Without Marshal describes Marshal, Ruby’s ultimate sharp knife, able to transform almost any object into a binary blob and back. Caching is critical to how Rails applications work. At every layer, whether it be in page rendering, database
Mixing It Up: Remix Joins Shopify to Push the Web Forward - Shopify
Mixing It Up: Remix Joins Shopify to Push the Web ForwardAt Shopify, the Remix open-source community has a strong sponsor and supporter that will enable the web framework to accelerate its roadmap. We are very excited to announce that the open-source web framework Remix and its team are joining Shopify. Why? The web is always evolving—and we’re entering a new era. First, we had the document web, a
React Server Components Best Practices You Can Use with Hydrogen - Shopify
React Server Components Best Practices You Can Use with HydrogenA deep dive into the patterns and best practices for React Server Components learned while building Hydrogen, Shopify's React-based framework for building custom storefronts. When my team and I started experimenting with React Server Components (RSC) while building Hydrogen, our React-based framework for building custom storefronts, I
The State of Ruby Static Typing at Shopify - Shopify
Shopify changes a lot. We merge around 400 commits to the main branch daily and deploy a new version of our core monolith 40 times a day. The Monolith is also big: 37,000 Ruby files, 622,000 methods, more than 2,000,000 calls. At this scale with a dynamic language, even with the most rigorous review process and over 150,000 automated tests, it’s a challenge to ensure everything works properly. Dev
How to Build a Web App with and without Rails Libraries - Shopify
How to Build a Web App with and without Rails LibrariesHow would we build a web application only using the standard Ruby libraries? In this article, I’ll break down the key foundational concepts of how a web application works while building one from the ground up. If we can build a web application only using Ruby libraries, why would we need web server interfaces like Rack and web applications lik
Under Deconstruction: The State of Shopify’s Monolith - Shopify
Under Deconstruction: The State of Shopify’s MonolithIt’s been 18 months since we talked about our Rails modular monolith. We lay out the current state of the work, and things we’d do differently if we started again. Ruby on Rails is a great framework for rapidly building beautiful web applications that users and developers love. But if an application is successful, there’s usually continued inves
React Native is the Future of Mobile at Shopify - Shopify
React Native is the Future of Mobile at ShopifyAfter years of native mobile development, we’ve decided to build all of our new mobile apps using React Native. As I’ll explain, that decision doesn’t come lightly. After years of native mobile development, we’ve decided to go full steam ahead building all of our new mobile apps using React Native. As I’ll explain, that decision doesn’t come lightly.
How to Write Fast Code in Ruby on Rails - Shopify
How to Write Fast Code in Ruby on RailsPart of Shopify’s success with Ruby on Rails is an emphasis on writing fast code. But, how do you really write fast code? Let’s talk about a few ways to start writing faster code in Active Record, Rails, and Ruby. At Shopify, we use Ruby on Rails for most of our projects. For both Rails and Ruby, there exists a healthy amount of stigma toward performance. You
Want to Improve UI Performance? Start by Understanding Your User - Shopify
Want to Improve UI Performance? Start by Understanding Your UserAsk yourself what the user is trying to accomplish when they visit a page. Once you know this, it helps identify the actions to improve UI performance. My team at Shopify recently did a deep dive into the performance of the Marketing section in the Shopify admin. Our focus was to improve the UI performance. This included a mix of impr
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Shopify’s journey to faster breadth-first GraphQL execution (2026) - Shopify
Remixing Shopify's Admin: How We Made It 30% Faster and AI-Ready (2025) - Shopify