Why is a B2B marketplace rarely “just a shop template”?

Because beyond a catalogue you need org hierarchies, permissions, cart splits and settlements across suppliers—and often credit workflows. That is domain logic and events, not a theme.

Do you integrate trade credit or receivables insurance?

Yes—as a common integration area. We connect finance partners and limit workflows to match your model, with idempotent APIs and audit trails.

What tech usually backs such an engine?

Often NestJS domain services, PostgreSQL, queues (Redis/RabbitMQ/SQS), Next.js storefronts; the commerce layer may be MedusaJS or bespoke when orders exceed standard catalogue assumptions.

B2B marketplace

Multi-vendor marketplace for B2B trade

When one cart connects many suppliers and one enterprise buyer

A B2B multi-vendor marketplace connects many suppliers to enterprise buyers in one cart—with split checkout, roles and limits; it almost always needs a custom backend (MACH, NestJS, queues), not a storefront template alone.

This is one of the hardest commerce shapes: you do not only sell your own catalogue — you orchestrate transactions between vendors and buying organizations. That requires account hierarchies (requesters, approvals, finance), contract- and volume-aware pricing, cart splits per supplier, different fulfilment SLAs, and platform fees and settlements. Credit insurance or trade limits are common. Templates rarely survive — we design domain services, API-first contracts and event flows (e.g. NestJS + PostgreSQL + queues), and connect the commerce layer with MedusaJS or a bespoke engine when the model exceeds standard catalogues.

Get in touch with us See process

MACH

Target architecture

API

First integrations

People on the team

Platform

From many suppliers to one customer order

Complexity sits in rules and data consistency — the UI is a thin layer over events and APIs.

Many SKUs, one checkout

Customers see a single flow; behind the scenes the order splits into fulfilments, stock moves and invoices per vendor.

Rules in domain code

Permissions, limits and contracts enforced in backend services — not in a cart template.

Settlement & fees

Split payment mechanics and platform reporting without manual spreadsheet reconciliation.

Traffic & peaks

Queues, retries and monitoring — readiness for concurrent B2B orders across vendors.

Cooperation process

How does our cooperation look like?

A transparent process that leads from idea to finished product

Step 01
Model & responsibility boundaries
We map parties (platform, vendors, buyers), order lifecycle, settlements and compliance. We define a credible MVP.
Step 02
Organizations & permissions
We design org trees, roles, purchase limits, approval paths and audit trails — the B2B foundation.
Step 03
Cart, split & fulfilment
We split orders per vendor, shipping costs, stock and SLAs. We define partial fulfilment and cancellation rules.
Step 04
Payments & settlement
Split payouts, platform fees, deferred payments, exports to ERP/finance. Gateways and credit partners as required.
Step 05
Scale & observability
Queues, idempotency, monitoring and load tests for “many vendors at once” scenarios.

Key benefits

Why choose us?

Business outcomes first—technology is the means, not the end in itself.

Org hierarchies

Many people and departments under one customer account — permissions under control.

Pricing & contracts

Commercial terms live in the system, not only in spreadsheets.

Split checkout

One customer order, many fulfilments and settlements for suppliers.

Security & audit

Traceability: who ordered, who approved, who sees which prices.

Questions about this system type

Why is a B2B marketplace rarely “just a shop template”?: Because beyond a catalogue you need org hierarchies, permissions, cart splits and settlements across suppliers—and often credit workflows. That is domain logic and events, not a theme.
Do you integrate trade credit or receivables insurance?: Yes—as a common integration area. We connect finance partners and limit workflows to match your model, with idempotent APIs and audit trails.
What tech usually backs such an engine?: Often NestJS domain services, PostgreSQL, queues (Redis/RabbitMQ/SQS), Next.js storefronts; the commerce layer may be MedusaJS or bespoke when orders exceed standard catalogue assumptions.

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

Redis

Cache / kolejki

RabbitMQ / SQS

Messaging

Headless & B2B commerce

Broader view of storefronts, MedusaJS and ERP/PIM integrations.

Client testimonials

What our clients say?

Case study

Results speak
for themselves.

100 000+

4,9

App Store

App downloads · 4.9 rating on App Store

SFD app nominated for Mobile Trends Awards 2025 (Commerce). Read more.

See the live app

App Store Google Play

“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.”

Mateusz Pazdan

CEO, SFD S.A.

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.”

5000+

Downloads in 1 month

Sprint weeks

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.

Many sellers × institutional buyers

Roles, limits, approvals and purchasing policies

Dynamic pricing from contracts, currencies and tiers

Split payments and platform commission

ERP / finance / credit-insurance integrations

Next.js storefronts or B2B portals on the same backend

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.

Schedule consultation Start brief assistant

Preliminary estimate in 48h

Fixed price after DDT — price guarantee

No commitment

We can sign NDA

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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gmi.software Sp. z o.o.ul. Jana Heweliusza 11 / 819
80-890 Gdansk, Poland

NIP: 5252816287KRS: 0000830003

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Mobile Trends Awards 2025 nomination - SFD app