Maksym S.

Top Rated Shopify and full-stack developer, 9+ years. Custom Shopify apps, checkout extensions, Shopify Plus and ERP/CRM integrations (React, Node.js). 500+ ecommerce projects delivered with the DevIT team, 80+ custom Shopify apps built. $400K+ earned on Upwork with 100% Job Success. I help Shopify brands build, optimize, and scale high-performing ecommerce products through custom themes, Shopify apps, and advanced integrations. 🛍️ Shopify Development (Core Focus) • Custom Shopify Themes (Online Store 2.0, Dawn, performance & CRO-focused) • Shopify App Development (Public & Private Apps) • Shopify API Integrations (Admin API, Storefront API, GraphQL, Webhooks) • Checkout Extensibility & Shopify Functions • Subscription, payment, tax, and shipping integrations • Shopify Plus customizations • Headless Shopify (Hydrogen / Next.js) ⚙️ Full-Stack Development (Advanced Cases) • React / Next.js ecommerce applications • Custom dashboards & internal business tools • Complex REST & GraphQL API integrations • Backend automation & workflow optimization • ERP, CRM, PIM, WMS, and 3rd-party platform integrations 📈 Results Delivered ✔️ 500+ successful ecommerce projects delivered ✔️ 9+ years of Shopify & ecommerce development experience ✔️ Helped brands achieve 20–65% faster page load speeds through theme optimization ✔️ Built solutions contributing to 15–40% higher conversion rates after UX and performance improvements ✔️ Developed 80+ custom Shopify apps and internal merchant tools ✔️ Integrated 150+ third-party services, including payment gateways, shipping providers, ERPs, CRMs, subscriptions, and marketing platforms ✔️ Successfully migrated 100+ stores from WooCommerce, Magento, BigCommerce, Shopware, and custom platforms to Shopify ✔️ Worked on stores processing millions of dollars in annual GMV ✔️ Maintained 99.9% deployment success rate through structured QA and CI/CD workflows 🧠 What I Focus On ✔️ Clean, scalable, and maintainable architecture ✔️ Fast-loading storefronts optimized for Core Web Vitals ✔️ Conversion-focused UX backed by performance improvements ✔️ Long-term maintainability and scalability ✔️ Business-oriented solutions that solve operational challenges—not just development tasks 🛠️ Tech Stack Shopify & Shopify Plus Liquid • JavaScript (ES6+) • TypeScript • HTML5 • CSS3 • Tailwind CSS Frontend React • Next.js • Hydrogen • Polaris • App Bridge Backend & APIs Node.js • REST APIs • GraphQL • Shopify Admin API • Storefront API • Webhooks • Shopify Functions Development Tools Shopify CLI • Git • GitHub • CI/CD 🎯 Typical Solutions I Deliver • Custom Shopify storefronts & scalable theme architecture • Public & private Shopify apps • Advanced cart, checkout & discount logic • Checkout UI Extensions & Shopify Functions • Subscription & recurring payment systems • Post-purchase upsell and cross-sell flows • Marketplace & multi-vendor functionality • ERP / CRM / PIM / WMS integrations • Inventory synchronization & automation • Headless commerce solutions with React & Next.js • Performance optimization & Core Web Vitals improvements Whether you need a custom storefront, a complex Shopify app, or a full-stack ecommerce platform, I build solutions that are scalable, maintainable, and designed to support long-term business growth. Updated: 11 October 2026