Rules on the backend
Consistent validation on web, B2B and API.
CPQ in ecommerce is a rules and BOM engine that validates configurations live, reprices from commodities or ERP, and outputs quotes or manufacturing data—typically Next.js + NestJS + ERP.

CPQ
The UI collects choices; the truth lives in domain models and integrations — not only in the cart.
Each combination maps to materials and operations — version controlled.
Users do not discover errors at payment — rules run continuously.
Tie-in to live commodity tables or ERP — with an audit trail.
Automated data packages for MES / files — fewer manual re-entries.
Cooperation process
A transparent process that leads from idea to finished product
01
Attributes, dependencies, BOM and pricing sources. Workshops with product and manufacturing.
02
Rules implemented in code with tests — not hidden client-side scripts.
03
Configuration snapshots, change history, re-pricing when costs move.
04
Quotes, orders, exports to production or CAD/CAM as your process requires.
05
Monitoring configuration errors, extending rules without regressions.
Key benefits
Business outcomes first—technology is the means, not the end in itself.
Consistent validation on web, B2B and API.
BOM trees and dependencies between modules.
Recalculation when commodities or FX change.
Bundles for the shop floor or subcontractors.
Content last updated: March 18, 2026
Modern tools and proven solutions for the best 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.”
Below is an example scope of work that we adjust to the stage and goals of the project.
Next step
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.