Subir B.

Need an experienced developer to build a custom Shopify solution, fix a complex technical issue, or integrate your store with external systems? I'm a versatile full-stack developer with 11+ years of experience specializing in Shopify, Shopify Plus, Laravel, SaaS platforms, custom applications, and API integrations. My expertise goes beyond traditional e-commerce development. I handle everything from Shopify storefront customizations and checkout extensions to complex backend systems, business automation, and scalable applications.. 🏆 Top Rated Upwork Freelancer 💯 100% Job Success Score ⏱️ 3,730+ Upwork Hours 💼 50+ Completed Projects 🔧 11+ Years of Development Experience 🚀 What I Can Help You Build Shopify & Shopify Plus Development - Custom Shopify themes and Figma-to-Shopify development - Shopify Functions, Cart Transform and advanced discount logic - Checkout UI Extensions and custom checkout functionality - Shopify public and private custom apps - B2B storefronts, wholesale workflows and customer-specific functionality - Subscription systems, product bundles and custom pricing - Shopify performance optimization, CRO and A/B testing - Third-party integrations, automation and troubleshooting Laravel, SaaS & Backend Development - Custom Laravel applications and SaaS platforms - REST and GraphQL API development - Payment gateway and subscription integrations - Custom dashboards, admin panels and business automation - Secure backend architecture, databases and cloud integrations 🔍 Examples of My Recent Work ✔ Developed custom Shopify Functions combining multiple promotional rules, including free gifts and conditional discounts. ✔ Built custom subscription and equipment leasing workflows with dynamic pricing, payment schedules and agreement integrations. ✔ Implemented advanced Shopify B2B storefront functionality, including wholesale-specific product visibility and automated workflows. ✔ Developed Shopify Plus CRO improvements, custom storefront features, and A/B testing implementations. ✔ Integrated Shopify with external platforms using GraphQL, REST APIs, webhooks and custom Laravel services. 🛠️ Technical Expertise Shopify, Shopify Plus, Liquid, Shopify Functions, Checkout Extensibility, PHP, Laravel, JavaScript, TypeScript, React, Next.js, Node.js, GraphQL, REST APIs, MySQL, PostgreSQL, MongoDB, AWS, WordPress, WooCommerce, Webflow, Wix, Squarespace, Klaviyo, Stripe and third-party integrations. 🤝 Why Work With Me? ✔ Direct communication with the developer doing the work ✔ Clean, maintainable and performance-focused code ✔ Careful testing before deploying changes to live stores ✔ Proactive technical recommendations and problem-solving ✔ Available for ongoing development and long-term partnerships Whether you need a quick technical fix, a custom Shopify app, or a complete Laravel platform, I can review your requirements and recommend a practical implementation approach. 📩 Send me an invitation with your project details, and let's discuss the best solution. Shopify Expert, Shopify Developer, Shopify Plus Developer, Shopify App Developer, Shopify Theme Developer, Full Stack Developer, Laravel Developer, React Developer, Next.js Developer, Node.js Developer, API Integration Expert, Shopify CRO, Ecommerce Developer, SaaS Developer, AI Automation Developer.