Shared codebase
One repo, many brands.
Multi-tenant
SaaS e-commerce for many stores
One codebase, hundreds of independent brands
Multi-tenant SaaS ecommerce is one codebase with strict data isolation across many stores or brands—with quotas, billing, and autoscaling for simultaneous traffic spikes and drops.
You are not building a single shop but a platform where customers launch instances — a niche Shopify for pharmacies, sports clubs or B2B. The crux is data isolation (tenant keys, schemas, row-level security), resource limits, billing and readiness when several tenants launch campaigns and traffic jumps by orders of magnitude. NestJS backends, PostgreSQL with strict policies, often Next.js with multi-tenant routing. MedusaJS can be a per-tenant component or a reference for the commerce layer — depending on licensing and model.
SaaS platform
Bank-grade isolation, startup-speed launches
Each tenant should feel dedicated — while you keep platform economics.
Data isolation
Database- and app-level policies — tested, not only configured.
Drop-ready
Autoscaling and quotas — neighbours cannot take your store offline.
White-label
Domains, themes and integrations per tenant without forking core.
Operations
Support consoles with safe, tenant-scoped views.
Cooperation process
How does our cooperation look like?
A transparent process that leads from idea to finished product
01
Tenancy model
Choose strategy: shared DB + RLS vs schemas vs clusters — risk and cost trade-offs.
02
Tenant onboarding
Provisioning, domains, templates, quotas and usage monitoring.
03
Product & billing
Plans, subscriptions, usage metrics — payment gateway integration.
04
Scaling
Autoscaling, queues, cache — “everyone on a drop” scenarios.
05
Security review
Cross-tenant penetration tests, backups and retention policies.
Key benefits
Why choose us?
Business outcomes first—technology is the means, not the end in itself.
Hard boundaries
Tenant data does not leak on mistakes.
Peaks
Architecture for concurrent campaigns.
Partner APIs
White-label and extensions for large clients.
Questions about this system type
- How do you isolate tenant data?
- By risk model: shared DB with RLS, separate schemas or clusters; cross-tenant testing and backup policies are part of delivery.
- How do you handle simultaneous drops across tenants?
- Autoscaling, queues, quotas and per-tenant observability—so one neighbour cannot starve the platform.
- Can the platform be white-label?
- Yes—domains, templates and integrations per tenant without forking core, on a shared codebase with safe APIs.
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
Client testimonials
They trusted us and see 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.”
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.
Multi-tenancy strategy aligned with compliance
Automated store creation and templates
Billing and resource quotas
Observability per tenant
NestJS + PostgreSQL + Next.js
Upgrade paths without whole-platform downtime
Next step
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.
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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