eCommerce Platforms · Medusa Development
Medusa.js development
We design, build and maintain commerce platforms on Medusa.js: storefronts, custom modules, admin extensions and integrations. Medusa is the open-source foundation of every Seedlight platform, so you get a team that ships on it weekly, not a generalist agency learning on your budget.
What is Medusa.js?
Medusa.js is an open-source commerce framework written in Node.js and TypeScript. Instead of a closed SaaS you configure, it gives you a set of commerce modules: products, prices, carts, orders, promotions and multi-region selling, plus an extensible admin panel. You connect the modules with your own code, run the platform on your own infrastructure and keep full ownership: no licence fees, no revenue share, no vendor lock-in.
The framework is headless: the backend exposes APIs and the storefront is a separate application, in our builds Next.js. That split is what makes deep customisation safe. Checkout, B2B logic and ERP integrations live in your codebase as first-class modules, not as a chain of third-party plugins.
Medusa or SaaS? An honest comparison
Shopify or Shoper are good tools to start on. Below are the differences that start to matter once the store grows and your processes stop fitting the standard.
If you are still validating your first store, SaaS is usually the better start. The Blueprint says so openly before you spend the budget.
Medusa Development
Why Medusa is our foundation, not a logo on a slide
Medusa.js is a modular, open-source commerce backend: every part of the business logic, carts, pricing, promotions, fulfilment, is a module you can extend or replace. That architecture is why we standardised on it: instead of fighting a monolith, we write your logic as first-class modules, and upgrades stay routine instead of becoming projects.
It also changes the economics. There are no licence fees or revenue share, hosting runs on commodity infrastructure, and the admin ships ready for your team. What you pay for is engineering that encodes your processes, and that investment stays yours, in a codebase your next team can read.
What we deliver
Production build
week 6 / 9How we do it
A Medusa build, week by week
A typical Medusa platform project closes in about 9 weeks. This is what that time looks like in practice:
Week 0
Blueprint
Data and integration audit, the domain model mapped to Medusa modules, a fixed quote and a week-by-week plan. Paid separately; the result is yours to keep.
Weeks 1–2
Foundation
Environments, CI/CD, the Medusa 2.x core with your data model and an import of the real catalog. We work on your products from day one, not on fixtures.
Weeks 3–5
Modules & storefront
Custom business-logic modules in parallel with the Next.js storefront: checkout, payments, shipping, customer accounts.
Weeks 6–7
Integrations & automation
ERP, WMS, analytics and AI workflows: descriptions, translations, feeds. This is where the platform starts saving your team hours.
Weeks 8–9
Migration, QA & launch
Data migration, SEO redirects, performance testing and a controlled cutover. After launch: hypercare and the hand-off into Maintenance & Growth.
Who Medusa is for, and who it is not for
A good fit when
- Your store has outgrown SaaS: app costs and fees keep climbing, and every new feature needs a workaround
- You need a custom checkout, B2B logic or ERP integrations that a closed platform cannot carry
- You treat the platform as an asset: you want to own the code, the data and the infrastructure
A poor fit when
- You are still validating the idea for your first store; SaaS will be faster and cheaper
- Your catalog and processes fit entirely within a SaaS standard, and nothing suggests that will change
- There is no budget for upkeep: an owned platform needs care, with us that means Maintenance & Growth
See it in practiceFrom a blocked SaaS store to an AI-native commerce platform9 weeks · from workshop to launchFAQ
Medusa.js development
Is Medusa mature enough for production?
Yes, Medusa 2.x runs production stores from startups to enterprise. Our whole platform practice is built on it, including every example build on this site.
Who hosts the platform?
You choose: your cloud or infrastructure we set up and operate for you inside Maintenance & Growth. Either way, the accounts and the code belong to you.
Why Medusa.js instead of SaaS?
Ownership and control: no revenue fees, integrations shaped around your processes and a codebase you own. The Blueprint tells you honestly whether that trade-off pays back in your case.
Can you take over an existing Medusa project?
Yes. We start with a technical Blueprint of the codebase and data, then either stabilise and extend it or plan a controlled rebuild, with a fixed quote either way.
How long does a Medusa build take?
A typical launch lands in about 9 weeks from kickoff, because the scope is fixed in the Blueprint before development starts.
How much does a Medusa.js build cost?
Scope and price are fixed and known after the Blueprint; we do not bill hours. Instead of licences and revenue fees you pay once for the build, then a Maintenance & Growth subscription if you want us to run the platform.
How does a Medusa platform handle SEO?
Very well, because the Next.js storefront renders server-side: full control over URLs, metadata, structured data and Core Web Vitals. On migrations, redirects and metadata transfer are part of the scope.
Do we need our own developers after launch?
No. Maintenance & Growth covers updates, monitoring and further development in a flat subscription. If you have a team, we hand over the codebase with documentation and onboarding support.
