Step 01
Countries & warehouses
Locations, stock, shipping costs and legal constraints.
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.
Composable
We do not mix customs rules with theme templates — isolated, testable, versioned services.
Warehouse and parcel selection algorithms — transparent cost to the customer.
One API for cart and B2B — consistent amounts on invoices and portals.
Fast Next.js — A/B tests and locales without touching the order core.
Stock and orders synchronised — fewer manual fixes after export.
Cooperation process
A transparent process that leads from idea to finished product
Step 01
Locations, stock, shipping costs and legal constraints.
Step 02
Services computing live totals for cart and checkout — with audit trails.
Step 03
Next.js UX layer — fast, testable, multi-channel.
Step 04
Carriers, customs brokers, ERP — queues and retries.
Step 05
Alerts on stock drift and compliance errors.
Key benefits
Business outcomes first—technology is the means, not the end in itself.
Cost/time optimisation across DCs.
Rule layer for jurisdictions and categories.
Swap modules without rewriting a monolith.
Same engine for web and apps.
Content last updated: March 18, 2026
Modern tools and proven solutions for the best results
Case study
App downloads · 4.9 rating on App Store
SFD app nominated for Mobile Trends Awards 2025 (Commerce). Read more.See the live app
“We talked to many vendors, but after the conversation with Mikołaj from GMI, I felt completely understood and saw my ideas visualized very quickly. That really captivated me, I felt it simply had to succeed. We have a 4.9 rating on the App Store, which I am very proud of. We continue to work with GMI: we have many ideas for further app development.”

More partner voices
The same way of working — deliveries for clients across industries.
Below: condensed references from recent years.

Sławomir Rdest
Board Advisor, EMKA S.A. / COO, EMKA Australia at EMKA S.A.
“As long-term clients of GMI Software, we have had the pleasure of working with them for several years. GMI Software stood out during the tender process with their refreshing, positive approach and the professionalism of their CEO and team. The first project was delivered flawlessly, establishing the foundation for a partnership that continues to this day. The GMI Software team members are not only experts in their field but also wonderful people to work with. For any organization seeking a partnership with a reliable and qualified software development company, GMI Software is a fantastic choice.”
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Sprint weeks
Below is an example scope of work that we adjust to the stage and goals of the project.
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.
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.