Catalogue and pricing live in several systems
The customer sees one shop, while teams reconcile stock, contract prices and orders by hand.
Headless and B2B commerce · UK delivery
Headless commerce development for UK operations
Modernise the customer experience without pretending the storefront is the whole commerce system.
GMI Software builds headless and B2B commerce around the operational reality: catalogue, pricing, stock, orders, customer roles, approvals and ERP/PIM/WMS integrations. UK teams get a same-day delivery rhythm and ownership from discovery through launch.
UK and Poland share the core working day.
A practical first conversation
Bring the goal, constraints and systems — not a finished specification.
- The business outcome and the person who owns it
- Users, current workflow and the costly friction
- Systems, data and integrations the product depends on
- Deadline, commercial range and non-negotiable constraints
100+ integrationsbusiness systems connectedERP, PIM, WMS, payments, APIs and legacy services.
UK operations proofQ2 Smart LockersA mobile and hardware-connected service deployed across five London locations.See evidence Europe and UK scaleHublock logistics platformWeb and mobile operations scaled to European and UK customers.See evidence A new storefront cannot repair an undefined operating model
B2B rules are forced into a B2C platform
Roles, approvals, quote flows and account-specific terms become brittle plugins and exceptions.
Migration is treated as a visual redesign
Data quality, redirects, payments, ERP events and rollback are left until the launch window.
What changes
Design the commerce operating system before choosing the storefront pattern
We map commercial rules, system ownership, data movement and failure handling before committing to architecture. MedusaJS, Next.js or a dedicated service is selected because it fits the operating model — not because headless is fashionable.
B2B portals and workflows
Contract pricing, roles, approvals, repeat ordering, quotes and account-specific catalogues.
ExploreMedusaJS delivery
Implementation, migration and custom modules with owned source code and open architecture.
ExploreERP, PIM and WMS integration
Explicit system ownership, event handling, retries, reconciliation and operational observability.
ExploreMigration and measurement
Data migration, SEO continuity, analytics and a staged release rather than a single irreversible cutover.
From uncertainty to production
A delivery path with an outcome at every gate
Commercial and operations map
We document customer types, channels, pricing, catalogue, fulfilment and the systems that own each fact.
Architecture and migration plan
APIs, data quality, event flows, security, redirects, analytics and rollback become explicit delivery dependencies.
Vertical release slices
We deliver complete customer journeys across storefront, commerce core and integrations rather than isolated layers.
Controlled launch
Reconciliation, performance, analytics and operational ownership are verified before traffic and channels scale.
Best for commerce complexity that standard configuration no longer absorbs
Strong fit
- B2B pricing, roles, approvals or partner portals
- Multiple warehouses, catalogues, brands or channels
- ERP/PIM/WMS integration is business-critical
- The business wants source-code and architecture ownership
Consider a different model when
- A small standard catalogue with no unusual workflows
- The existing SaaS platform already supports the required model cleanly
- There is no owner for catalogue, pricing and order data
Questions UK teams ask before the first scope
Do you only build on MedusaJS?
No. MedusaJS is a strong option for owned, extensible commerce, but architecture follows the operating model. We also work with existing platforms and dedicated services when that is the lower-risk choice.
Can you integrate with an existing ERP, PIM or WMS?
Yes. We first establish which system owns each business fact and how failures are detected and recovered. The integration is then scoped as a product capability, not a hidden technical task.
How do you reduce migration risk?
With source-data profiling, mapping, rehearsals, reconciliation, redirect and analytics plans, a launch checklist and a rollback path proportionate to the business risk.
Is headless commerce always the right choice?
No. If a standard platform supports the business model without excessive exceptions, it can be the better commercial decision. Discovery should prove the need for headless.
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