Justin Mather
Associate Manager, Front End Development
Los Angeles, California, United States
Summary
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SeniorJustin Mather is a Solutions Architect and UI engineer with 11 years of experience designing and delivering high-quality, performance-focused web applications for enterprise and consumer brands. He has led front-end teams and architecture for major Shopify and headless builds (Skims, Spanx, General Mills, Fiji Water) using React, Vue, TypeScript and modern headless tooling, while driving framework upgrades, design systems, and complex third-party integrations. Known for improving delivery through mentorship, documentation, and reusable component libraries, he also optimizes large-scale sites for reliability and zero-downtime events. Based in Los Angeles, he combines hands-on engineering with cross-functional leadership—bringing product-minded thinking to technical trade-offs. A detail that often goes unnoticed: he pairs engineering velocity with operational rigor, shipping SSR and defensive TypeScript migrations that materially improved performance for sites with hundreds of thousands of monthly users.
11 years of coding experience
12 years of employment as a software developer
Spanish, English
Github Skills (65)
trello10
markdown10
knowledge-management10
knowledge-graph10
graph10
org-mode10
clojurescript10
clojure9
oocss9
collaboration9
media-keys9
goodies9
styles9
utility9
css-library9
Programming languages (11)
Github contributions (5)
itsjustmath/itsjustmath.github.io
Apr 2019 - Mar 2022
v1 of my personal website
Contributions:94 commits, 2 PRs, 40 pushes in 2 years 11 months
jekyll-sitereactnextjstufte-css
itsjustmath/itsjustmath.net-v2
Feb 2022 - Jul 2024
A living collection of my thoughts, writings, and portfolio. Built with Next.js, React, MDX, and Tufte CSS.
Contributions:6 releases, 26 PRs, 66 pushes in 2 years 5 months
mdxnextjstufte-css
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