Jean M.

Senior full-stack Shopify developer. 14 years of engineering, 6+ on Shopify and Shopify Plus, 86 contracts on Upwork with 100% job success and 3,000+ hours logged. I build the parts of a store most freelancers avoid: custom theme development from scratch, Liquid and JSON templates, Shopify Functions, checkout extensions, custom apps on the Admin and Storefront APIs, Hydrogen and headless storefronts, migrations from WooCommerce, Magento or an old theme, and integrations with ERPs, 3PLs, subscriptions and loyalty apps. If it's Liquid, JavaScript or the Shopify API, I've probably shipped it already. Until recently I was a senior developer at a Shopify Plus agency, so I'm used to working with brands that ship every week and can't afford a broken checkout on a Friday. What you get is one engineer, no PM layer. I read the requirement, ask the questions that actually matter, write the code, test it and deploy it. Everything documented so your next developer can pick it up without calling me. I've never left a client hanging, and I'm honest about scope: if something is out of my range or a bad idea for your store, I'll tell you before you spend a dollar. Open to fixed-price projects, hourly work and ongoing retainers. Send me what you're trying to build and I'll tell you how I'd approach it.