Shopify developer
Become the Shopify dev they call for the hard stuff.
Performance, Liquid, checkout, architecture: the stuff that separates a theme editor from an engineer. Five years in, today Lead E-commerce Developer at Plant Therapy. This is the work, and how I think about it.
Portfolio
Selected work
Marca de bienestar DTC (+1M USD/mes)
De un tema heredado ahogado en apps a un Online Store 2.0 con Vite y Alpine.js, sin jQuery y sin perder una sola página de producto en producción.
Marca de tomatodos
Un A/B test en la página de inicio: trust badges y social proof contra la versión actual. La variante ganó con 50% más de conversión y 58% más de revenue per visitor.
Focus
What I do
Themes and performance
Custom themes that load fast, with just enough JavaScript and images under control.
Checkout and Functions
Migration to Checkout Extensibility and discount logic with Shopify Functions.
Structured content
Metafields modeled before touching Liquid, so the team can edit without fear.
Lighthouse · mobile
CLS 0 · this site, audited now
About
Not blog theory. What I ship in production.
I am Sergio Herrera. Five years doing Shopify, today Lead E-commerce Developer at Plant Therapy and founder of MTB Labs. What you read here is what I run on real stores every day, not what sounds good.
This very page scores 100 across all four Lighthouse categories. I practice what I preach.
More about me