Muhammad U.

I build and fix custom functionality on Shopify stores: theme sections, product and variant logic, subscription flows, cart behavior, and A/B test implementation. Most of my work is inside existing stores where the theme, third-party apps, and custom code all have to coexist. What I've worked on - Subscription stores: Recharge integration, custom plan and product selectors, dynamic add-to-cart behavior - Multi-language stores (English/German): Shopify Markets, localization, translated storefront content - CRO implementation: custom landing pages, VWO A/B tests, Klaviyo and Trustpilot integrations - Custom sections and reusable components on Online Store 2.0 themes (Liquid, JavaScript, Shopify CLI) - Debugging: third-party app conflicts, broken variant and cart logic, theme JavaScript errors, mobile layout issues - Payment gateway integrations and metafield/metaobject-driven functionality How I work I read the existing theme before touching it, make changes in a duplicate theme or Git branch, test on desktop and mobile, and tell you what changed and why. Average response time on Upwork is under 4 hours. Good fit Custom product page or variant behavior, a subscription setup that isn't working, a bug no app will fix, landing pages you plan to A/B test, or a developer to own ongoing theme work. Not a good fit Theme installs, product uploads, dropshipping store setups, logo work. Stack: Shopify (Liquid, Online Store 2.0, Shopify CLI, Shopify APIs, metafields, metaobjects), JavaScript, HTML, CSS, Git/GitHub, Recharge, Klaviyo, VWO.