Systems we build

Custom ERP & business systems

The system your business actually runs on — custom ERP and operational software that replaces the tangle of spreadsheets and half-fitting SaaS. Built on a proven open-source core (Open Mercato) or the right modern stack, tailored to how you work, and owned outright — no per-seat fees, no lock-in.

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Proof, not promises

Custom ERP & business systems we've shipped

MyEvaluations — Medical-training SaaS modernized without a rewrite
SaaS · Healthcare / EdTech
MyEvaluations

Modernized a 20-year-old C# monolith powering most US health universities — incrementally, no big-bang rewrite.

How we think, not just what we type

Concepts & patterns we work in

The ideas behind the tools — the patterns we've applied in production, not buzzwords.

The 80/20 modelOwn your stack — no per-seat fees, no lock-inSystems consolidationReplace spreadsheets with validated workflowsIntegrate, don't rip-and-replaceGradual, module-by-module migrationModular monolithEvent-driven modules

The stack we reach for

What we actually use

The tools and languages we have real, shipped experience in — not a wish list.

Core
Open MercatoPayload CMS
Data layer
MikroORMpgvector
Modules
Order managementCRMInvoicingInventory
Integrations
Polish ERPs (Subiekt · Streamsoft)PaymentsThird-party APIsWebhooks
Search & AI
RAG / LLMs

Related

Explore further

Manufacturing & production systems →Order management & ERP integration →Custom CRM & sales operations →Why Open Mercato →

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