Why brands are retiring Oracle ATG
Oracle ATG Web Commerce (now part of Oracle Commerce) powered a generation of large enterprise storefronts, and many are still on it. The problem is that it is a heavyweight, on-premise Java platform: expensive to host and license, slow and costly to change, and supported by an ever-smaller pool of ATG specialists. Brands move to Shopify to trade that weight for a managed platform their team can actually move fast on, without giving up enterprise scale.
The ATG challenge
ATG migrations are among the hardest in commerce because the platform was built to be deeply customized.
- Years of bespoke Java customization and business logic tightly coupled to the platform.
- ATG's scenario and personalization engine, whose behavior has to be re-created with modern equivalents.
- Very large catalogs and high-traffic storefronts that test platform limits.
- Tight coupling to back-office systems, order management, fulfillment, and search, that must move in lockstep.
Re-creating ATG capabilities on Shopify
The work is mapping what ATG did to how Shopify does it: catalog and pricing into Shopify's model, personalization and merchandising into modern search and recommendation layers, and bespoke logic into Shopify Functions, apps, and headless services rather than a monolith. At catalog and traffic scale, a headless build on Hydrogen and Oxygen is often the right architecture.
Data migration and SEO
Enormous catalogs are migrated and reconciled in stages, with the relationships between products, customers, and orders preserved. ATG's URL structures are mapped completely to clean Shopify URLs with 301 redirects, canonicals, and a refreshed sitemap, so a high-traffic site does not lose its rankings the day it moves.
Integrations and cutover
ATG sits at the center of a retail operation, so the migration re-wires order management, fulfillment, search, and loyalty as first-class work, then cuts over in a sequenced, zero-downtime program.
This is precisely the kind of build we are known for. SDG re-platformed Barnes & Noble, America's largest bookseller, off its legacy stack and onto Shopify: 14M+ SKUs, 750+ stores, headless on Hydrogen and Oxygen, fully omnichannel, in what Shopify itself ranks among the most complex builds in its history. See the Barnes & Noble case study.