Fulfilment routing
Cost/time optimisation across DCs.
Cross-border
Cross-border composable commerce
Many warehouses, law and tax in real time
Cross-border composable commerce pairs a headless storefront (e.g. Next.js) with OMS, tax and duty services so shoppers see final, compliant pricing before they pay.
Selling from many locations is not only “another language”. An OMS must pick fulfilment in milliseconds, while pricing must respect VAT, duties, clearance costs and export restrictions per product category. A Next.js headless storefront calls pricing and availability services; MedusaJS or dedicated microservices hold catalogue and orders; NestJS aggregates carriers, customs brokers and finance integrations. This is composable commerce: best-fit modules connected by API contracts.
Composable
Legal & pricing next to the catalogue
We do not mix customs rules with theme templates — isolated, testable, versioned services.
OMS decides “from where”
Warehouse and parcel selection algorithms — transparent cost to the customer.
Tax as a service
One API for cart and B2B — consistent amounts on invoices and portals.
Headless front
Fast Next.js — A/B tests and locales without touching the order core.
ERP consistency
Stock and orders synchronised — fewer manual fixes after export.
Cooperation process
How does our cooperation look like?
A transparent process that leads from idea to finished product
01
Countries & warehouses
Locations, stock, shipping costs and legal constraints.
02
Pricing & tax engine
Services computing live totals for cart and checkout — with audit trails.
03
Headless storefront
Next.js UX layer — fast, testable, multi-channel.
04
Integrations
Carriers, customs brokers, ERP — queues and retries.
05
Observability
Alerts on stock drift and compliance errors.
Key benefits
Why choose us?
Business outcomes first—technology is the means, not the end in itself.
Law & tax
Rule layer for jurisdictions and categories.
Composable
Swap modules without rewriting a monolith.
Omnichannel
Same engine for web and apps.
Questions about this system type
- Why does cross-border break on one monolith?
- Because tax, duties and warehouse routing change faster than UX—composable lets you version and test compliance services separately from the storefront.
- What does the OMS do here?
- It chooses fulfilment sources and shipments for cost, time and availability—often across countries with transparent totals for the buyer.
- Do you integrate carriers and customs?
- Yes—as an integration layer with queues and retries, tied to pricing and order status.
Content last updated: March 18, 2026
Technologies
What technologies do we use?
Modern tools and proven solutions for the best results
Next.js
Frontend
MedusaJS
Commerce core
NestJS
Backend
TypeScript
Language
PostgreSQL
Database
REST / events
Integracje
Client testimonials
They trusted us and see results.
EMKA S.A.
Sławomir Rdest
Board Advisor, EMKA S.A.
“As long-term clients of GMI Software, we had the pleasure of working with them for several years. GMI Software stood out during the tender process with a refreshing, positive approach and the professionalism of the CEO and team.”
Service scope
What does the service include?
Below is an example scope of work that we adjust to the stage and goals of the project.
Multiple warehouses and allocation strategies
All-in prices with taxes and fees before payment
Headless Next.js + Medusa / NestJS APIs
Logistics and customs integrations
Delivery estimates aligned with real stock
Monitoring and regression tests when regulations change
Next step
Ready to start?
Schedule a free consultation and learn how we can help with your project. After our DDT process (Discovery, Design & Technology), we offer a price guarantee and a fixed-price agreement.
Contact
Let's talk
about the project.
Have an app idea or need technological support? Write to us — we'll prepare a preliminary analysis and estimate within 48h. Projects that go through our DDT process (Discovery, Design & Technology) come with a price guarantee and a fixed-price agreement — a key differentiator for us.
Write to us[email protected]
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80-890 Gdansk, PolandNearshore product delivery across EU, UK and US time zones.
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