Magnus Torsen

I’m a Senior Shopify Full Stack Developer with 7+ years of hands-on experience building, optimizing, and scaling high-performance eCommerce platforms. I love working across the Shopify ecosystem—from theme customization and custom app development to API integrations and performance tuning—to deliver seamless user experiences that boost conversion and revenue.

At Shopify ProDevelopers Inc., I led end-to-end development of 15+ custom Shopify stores, delivering an average 35% increase in site speed and a 25% uplift in conversion rates. I used advanced Liquid templating, JavaScript optimizations, and headless commerce implementations using Hydrogen, and I also built bespoke Shopify apps for inventory management and personalized recommendations. I integrated with Klaviyo and Stripe, handling over 500,000 monthly transactions without downtime.

Previously, as a Senior Shopify Developer and Team Leader at German Shopify Experts GmbH, I developed and maintained 10+ enterprise-level Shopify themes using HTML5, CSS3 (Sass/SCSS), and vanilla JavaScript—while adhering to WCAG accessibility standards. I integrated subscription models via Recharge, added AR/VR product previews, and improved performance in high-traffic stores up to 100,000 visitors/day using Cloudflare caching strategies and lazy loading for sub-2-second page loads.

I started as a Junior Shopify Full Stack Developer and progressed through theme customization, migrations, and experimentation—enhancing site search and filters to increase conversion rates by 15%, and modernizing stores to raise user engagement by 20%. I’m a strategic problem-solver who thrives in fast-paced agile environments and enjoys mentoring others, sharing best practices around Shopify’s GraphQL API and scalable architecture.