MedusaJS development agency in Europe - how to choose
A strong MedusaJS agency in Europe is not a team that only ships a Next.js storefront - it is a partner with live B2B plus ERP deliveries, monolith migrations and post-launch care. GMI Software from Gdansk works in English for EU, UK and US clients; we share an initial estimate within 48h after discovery.
When a Medusa agency makes sense (and when it does not)
Medusa v2 fits when you need headless commerce with code ownership, custom B2B workflows (contract pricing, credit limits, order approval) or omnichannel on one API - web, mobile app, maybe POS. It is not the answer to “we want a store faster than Shopify” without appetite for a dev team and discovery.
A Medusa agency is a poor fit for pure D2C with a small catalog and no ERP integrations - SaaS can be cheaper in year one. Medusa wins on a 2-3 year horizon when checkout control, no GMV fees and module extensibility matter more than fastest launch.
Medusa v2 partner vs storefront vendor
A storefront vendor ships a Next.js template on Medusa Admin API, often without migration experience, B2B modules or warehouse integrations. A platform partner designs the commerce layer: data models, events, ERP/PIM sync, observability and release planning for peak sales.
Red flag: the agency talks mostly about “beautiful UI” and never asks where prices are sourced, how stock is reconciled or how marketplace split checkout works. Another flag: portfolio is Medusa landing pages only, with no case studies backed by numbers (conversion, uptime, migration timeline).
Control question on the first call: “Show a Medusa v2 module you wrote that runs in production for a B2B client.” If the answer stops at a storefront theme - that is not a partner for enterprise scope.
What agency directories will not show
Directories like Clutch, DesignRush and GoodFirms are useful for an initial shortlist, but they often mix software houses, body leasing, frontend shops and commerce partners in one table. A rating does not tell you who owns data migration, rollback, monitoring, checkout QA and post-go-live maintenance.
For a CTO, three proofs matter more than star count: live commerce with production traffic, ERP/PIM/WMS integration under real data pressure and a team willing to say “Medusa does not make sense for this scope”. An agency that always recommends Medusa is selling technology, not a decision.
Medusa.com emphasizes custom workflows, modules and ownership of commerce logic. That means the partner must understand domain architecture, not only launch a Next.js starter and connect a few endpoints.
Medusa agency selection scorecard
Use this scorecard before signing an NDA or RFP. If an agency cannot answer concretely, a B2B or migration project will likely drift into time-and-materials without clear accountability.
- Platform ownership: does the team design Medusa modules, workflows, data and integrations, or only the storefront?
- Production proof: do they have a live case with traffic, payments, peaks and maintenance, not only a demo repo?
- Integration depth: do they ask about ERP/PIM/WMS, source of truth, queues, idempotency and error monitoring?
- Commercial model: does fixed price come only after DDT, with scope and risks explicitly documented?
- Exit safety: does the client receive repositories, architecture docs, runbook and code rights?
Delivery model for EU, UK and US clients
Poland nearshore gives 9-17 CET overlap with most of Europe and a morning window to US East Coast. English delivery, architecture docs in English and EUR/USD invoicing are baseline at tier-1 software houses, not a premium add-on.
Typical GMI model: 1-3 week discovery (DDT), fixed price on agreed scope, 2-week sprints with demos, internal code review and repository handover to the client. On larger programmes we combine a product team with dedicated Medusa and Next.js developers under one tech lead.
For UK/US clients, compliance matters too (PCI scope on payments, GDPR on EU data) - the partner should explain what stays on Medusa/hosting versus payment integrations and logging.
Production evidence worth asking for
The best Medusa agency conversation does not start with hourly rate. It starts with reviewing one similar project: what the architecture looked like, what the source of truth was, how long migration took, what broke after go-live and who maintains the platform today.
Ask for trade-off examples: when the partner kept a client on Shopify/Adobe Commerce, when they chose Medusa, when they narrowed the MVP and when they refused fixed price without discovery. That shows maturity better than a technology list.
At GMI we connect proof across clusters: Medusa and headless commerce on the platform side, React Native on the app side, NestJS/PostgreSQL for integrations and maintenance. For B2B buyers that matters because commerce rarely ends at the web storefront.
RFP and shortlist questions for agencies
A solid RFP includes a target architecture sketch, integration list and a business deadline - e.g. B2B season or Magento decommission. Without that, comparing quotes is comparing guesses.
- How many Medusa v2 (not v1) deliveries are live and what integrations were involved?
- Who migrates catalog and historical orders?
- Pricing model - T&M or fixed price after discovery?
- B2B experience: price lists, credit limits, approval flows?
- Who runs the platform post go-live and what does SLA look like?
- Can you connect a React Native app to the same API as web?
When GMI is not the best fit
GMI is not ideal when you want body leasing only with no product ownership on your side, when the project is pure D2C without integrations and budget is below the point where headless pays off, or when full-year US on-site is mandatory with no remote.
We are strong on Medusa v2 + Next.js + React Native, B2B migrations and fixed price after DDT. If that matches your programme - let us talk. If you only need a cheap theme - a freelancer or template shop is a better fit.
Next step: estimate and discovery
If your shortlist is ready and you have an architecture sketch, contact GMI - you will get an initial scope and budget range within 48h. A full fixed-price offer requires DDT: business and IT workshops, data audit and migration roadmap.
MedusaJS development service details: https://gmi.software/services/medusajs-development
Sources and references
MedusaJS v2 documentation: https://docs.medusajs.com
Medusa platform and user stories: https://medusajs.com
Medusa integrations documentation: https://docs.medusajs.com/resources/integrations
Medusa modules documentation: https://docs.medusajs.com/learn/fundamentals/modules
Clutch - ecommerce developers and agency shortlists: https://clutch.co/developers/ecommerce
DesignRush - ecommerce development companies: https://www.designrush.com/agency/ecommerce
GMI MedusaJS development: https://gmi.software/services/medusajs-development
Frequently asked questions
- Medusa agency Poland or UK?
- Poland nearshore lowers cost at the same CET overlap as the UK with strong English in tier-1 houses. GMI works with both markets - the choice depends on on-site needs and budget, not location quality alone.
- How long does a Medusa agency project take?
- Medusa v2 + Next.js MVP: typically 3-5 months. B2B with ERP and data migration: 5-9 months depending on catalog quality and integration count. Discovery before kickoff reduces schedule slip risk.
- Must the agency know Medusa v1?
- No - v2 is a different modular architecture. What matters is v2 experience and migrations from Magento, WooCommerce or custom monoliths, not legacy v1 storefronts.
- Fixed price or time and materials?
- After DDT we recommend fixed price on agreed scope - predictable budget for the CTO. T&M stays for discovery or when the client wants their own product owner and a flexible backlog without frozen scope.
Content updated: July 11, 2026