Step 01
Tenancy model
Choose strategy: shared DB + RLS vs schemas vs clusters — risk and cost trade-offs.
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.
RLS
Isolation
SRE
Peaks
API
White-label
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
Step 02
Tenant onboarding
Provisioning, domains, templates, quotas and usage monitoring.
Step 03
Product & billing
Plans, subscriptions, usage metrics — payment gateway integration.
Step 04
Scaling
Autoscaling, queues, cache — “everyone on a drop” scenarios.
Step 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.
Shared codebase
One repo, many brands.
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
R
REST / events
Integracje
R
Redis
Cache / kolejki
R
RabbitMQ / SQS
Messaging
Client testimonials
What our clients say?
Case study
Results speak
for themselves.
100 000+
4,9
App StoreApp downloads · 4.9 rating on App Store
SFD app nominated for Mobile Trends Awards 2025 (Commerce). Read more.See the live app
“We talked to many vendors, but after the conversation with Mikołaj from GMI, I felt completely understood and saw my ideas visualized very quickly. That really captivated me, I felt it simply had to succeed. We have a 4.9 rating on the App Store, which I am very proud of. We continue to work with GMI: we have many ideas for further app development.”
Mateusz Pazdan
CEO, SFD S.A.
More partner voices
The same way of working — deliveries for clients across industries.
Below: condensed references from recent years.
Sławomir Rdest
Board Advisor, EMKA S.A. / COO, EMKA Australia at EMKA S.A.
“As long-term clients of GMI Software, we have had the pleasure of working with them for several years. GMI Software stood out during the tender process with their refreshing, positive approach and the professionalism of their CEO and team. The first project was delivered flawlessly, establishing the foundation for a partnership that continues to this day. The GMI Software team members are not only experts in their field but also wonderful people to work with. For any organization seeking a partnership with a reliable and qualified software development company, GMI Software is a fantastic choice.”
5000+
Downloads in 1 month
14
Sprint weeks
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
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.
Preliminary estimate in 48h
Fixed price after DDT — price guarantee
No commitment
We can sign NDA
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.
gmi.software Sp. z o.o.ul. Jana Heweliusza 11 / 819
80-890 Gdansk, Poland
80-890 Gdansk, Poland
NIP: 5252816287KRS: 0000830003
Free consultation
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