Kulvir K.

Enterprise eCommerce engineer with 10+ years of experience building scalable Shopify Plus and BigCommerce solutions for agencies and high-growth brands across North America. I specialize in architecting performance-driven storefronts, headless commerce systems, and complex B2B workflows that integrate deeply with business-critical platforms. I work on projects that require more than standard theme or app work — I build reliable, scalable commerce systems designed for real operational complexity, including ERP/CRM integrations, multi-channel inventory flows, and advanced pricing logic. **Core expertise:** * Shopify Plus development: custom themes, Checkout UI Extensions, and B2B implementations * BigCommerce development: Stencil builds and Catalyst (headless architecture with Next.js & TypeScript) * Headless commerce using React, Next.js, and API-first architecture * Complex B2B solutions: contract pricing, customer-specific catalogs, bulk ordering, and approval workflows * Enterprise integrations: ERP, CRM, PIM, payment gateways, shipping, and tax systems * REST and GraphQL API design and integrations across distributed systems **Recent highlights:** * Led enterprise Shopify B2B migration with custom pricing models, catalogs, payment terms, and workflow automation * Built and launched a live Shopify App Store application: Bulk Tag Manager * Delivered BigCommerce Stencil and Catalyst storefronts across US, Australia, and New Zealand markets * Integrated BigCommerce with Zoho ERP including order sync, inventory management, and fulfillment automation **Tech stack:** BigCommerce Stencil · Catalyst · Shopify Plus · Next.js · React · TypeScript · JavaScript · GraphQL · REST APIs · Liquid · Checkout UI Extensions · Tailwind CSS · Vercel · Git · CI/CD · Headless Architecture Top Rated freelancer with a 100% Job Success Score and consistent 5-star client feedback. I focus on clean architecture, clear communication, and production-ready delivery that supports long-term business growth.