Matt Seccafien

Matt Seccafien

Senior Front End Developer at DeepL, working on Design Systems
Design Systems and UI in a Bi-directional World
React Summit US 2025React Summit US 2025
Upcoming
Design Systems and UI in a Bi-directional World
When DeepL added Arabic—its first RTL language—it wasn’t just a styling problem, it was a design systems challenge. This talk will go deep on logical CSS, platform-agnostic icon mirroring and automation, soft enforcement strategies for design consistency, and how to wield influence across hundreds of engineers with minimal headcount. This isn’t a story about building components—it’s about wiring them together at scale, with smart defaults, localization and directional and empathy.
The Forest for the (Abstract Syntax) Trees
React Advanced 2021React Advanced 2021
8 min
The Forest for the (Abstract Syntax) Trees
Call it "kickstarting", "scaffolding", "bootstrapping" or simply "typing words in a terminal and getting files to start with", this is often the first opportunity for a framework to either delight or disappoint developers. How easily can they get up and running, can they extend it with their ideal toolchain and how well will it scale? In this talk we'll explore the limitations of current solutions and examine the ways we set out to improve the developer onboarding experience of Shopify's new Hydrogen React framework and SDK.
Build a Custom Storefront on Shopify with Hydrogen
React Advanced 2021React Advanced 2021
170 min
Build a Custom Storefront on Shopify with Hydrogen
Workshop
Hydrogen is an opinionated React framework and SDK for building fast, custom storefronts powered Shopify. Hydrogen embraces React Server Components and makes use of Vite and Tailwind CSS. In this workshop participants will get a first look at Hydrogen, learn how and when to use it, all while building a fully functional custom storefront with the Hydrogen team themselves.