Juan Sebastian V.

I connect Shopify brands and manufacturers to the retailers that sell their products: Wayfair, Amazon, Overstock, EDI partners and SAP Ariba buyers. No middleware fees, no orders typed in by hand. If you sell home goods, furniture or decor through retail partners, you probably know at least one of these: - Retail orders are keyed in by hand and tracking goes back late. - You pay a monthly fee to a middleware (Logic Broker, CommerceHub, a PunchOut app) just to move orders and inventory. - Stock is out of sync between Shopify and every channel, so you oversell or miss sales. - A corporate buyer asks for PunchOut or cXML and nobody on your team knows where to start. What I have built: - A white-label print-on-demand platform, Printful style: sellers connect their Shopify, Etsy or WooCommerce store and every order flows straight to fulfillment, with an order API, webhooks, ShipStation shipping and automatic QuickBooks invoicing. - Direct dropship integrations with marketplaces and EDI trading partners (850, 856, 810), replacing a paid middleware. - SAP Ariba PunchOut catalogs and cXML purchase orders for enterprise buyers, running in production. - Catalog automation for 60,000+ SKUs across Shopify, Amazon, Wayfair, Perigold and Etsy. Shopify development: - Custom sections built from scratch: mega menus, product pages with variant logic, B2B and wholesale pricing, checkout rules. - Landing page systems: 60+ custom sections and industry landing pages for a B2B consultancy. - Site speed and Core Web Vitals optimization. Platforms I work with: Wayfair, Amazon, Overstock, Perigold, Home Depot, Target Plus, Faire, Etsy, SPS Commerce, SAP Ariba, ShipStation, ShipBob, EasyPost, QuickBooks, Xero, NetSuite. How I work: fixed milestones with clear deliverables, everything tested in a sandbox or a duplicate theme before it touches live orders, and documentation your team can actually use. I build with AI tools every day, which lets me deliver as a one-person team at the pace of a small agency. My hours overlap with U.S. East Coast mornings. Stack: Shopify (Liquid, Admin API, apps), Node.js, PostgreSQL, REST, XML, cXML, EDI, n8n, Claude AI. Send me your store URL and the channel that is giving you trouble. I will tell you how I would connect it. Top Rated Plus · 100% Job Success · 1,200+ hours on Upwork Juan Sebastián Valencia G.