SaaS Development: Multi-Tenant Products from MVP to Production
We build SaaS products that scale with paying customers — from the first tenant boundary to a permissions and billing model that survives an enterprise review. Senior-level engineering with Next.js, FastAPI, and PostgreSQL, production-ready in 4 to 12 weeks. No senior hire required, no vendor lock-in.
What we build for your SaaS
Multi-tenant architecture from day one: clean tenant isolation, authentication with SSO, and role-based access control (RBAC) that models team leads, external partners, and auditors without turning into spaghetti. Plus billing with plans, seats, and usage limits, admin and customer dashboards, and a documented API. We build what drives revenue first — the rest follows in weekly iterations.
How we work
Lean and transparent: weekly demos of working software instead of status slides, no surprises. We ship the narrowest viable slice to production first, then extend it along real usage. Tests, clean code, and documentation from the start — so the product stays handoff-ready and your own engineers can plug in later.
The technology stack
Next.js, React, and TypeScript on the front end for type-safe dashboards and fast iteration. Python and FastAPI on the back end, PostgreSQL as the data layer with row-level isolation for tenants, all containerized with Docker for reproducible deploys. Kubernetes, Terraform, and CI/CD over GitHub or GitLab when you need them. Proven technology with a deep talent market — nothing proprietary to lock you in.
Why Olio
You get senior-level engineering without the cost and risk of a full-time hire. We think long-term: clean, tested, documented code that stays maintainable after handoff. Multi-cloud across AWS, Azure, GCP, and Hetzner means we pick hosting to fit your requirements — not our contract.
What you get
- Production-ready multi-tenant SaaS in 4 to 12 weeks, not months of setup
- Auth, billing, RBAC, and dashboards that pass enterprise and GDPR review
- Architecture that scales from ten to ten thousand paying customers, no rebuild
- Weekly demos of working software — you see progress, not slides
- EU-sovereign, GDPR-compliant hosting of your choice, no vendor lock-in
- Tested, documented code your team can take over later
Core Technologies
Let's build your SaaS
Frequently asked questions
What does it cost to build a SaaS product?
A simple MVP runs EUR 25,000 to 40,000. A full SaaS MVP with AI features and a more complex data model lands between EUR 50,000 and 120,000. We scope the exact figure after an initial call where we walk through your tenancy, permissions, and billing requirements.
How long until the first production release?
A viable MVP is typically in production within 4 to 12 weeks. We build the revenue-bearing core first — auth, tenant isolation, the first billable feature — then extend in weekly iterations driven by real usage.
What does working with you look like?
Lean and transparent. You see a demo of working software every week, not a status deck. We ship the narrowest sensible slice live first, then prioritize what comes next together, based on what your customers actually use.
Which technologies do you use?
Next.js, React, and TypeScript on the front end, Python with FastAPI on the back end, PostgreSQL for data, and Docker for reproducible deploys. Kubernetes, Terraform, and CI/CD when scale demands it. All proven technology with a deep talent market — no proprietary lock-in.
Can you host in the EU with GDPR compliance?
Yes. We host multi-cloud across Hetzner, GCP EU regions, or AWS Frankfurt, depending on your data-residency and compliance needs. You keep full control of the infrastructure and stay independent of any single provider.
Let's Talk
