SaaS applications
Plan / Build / RunA SaaS built on weak foundations costs you every sprint afterward. We put the right base in place — multi-tenancy, scalability, security — before the first product feature ships.
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These architecture mistakes compound every sprint — often as soon as real customers hit production.
Tenant data isolation must be designed into the database schema — not bolted on later
Billing, plans, and usage limits: if the architecture does not anticipate them, every change becomes a project
The first traffic spike always comes earlier than expected; unprepared infrastructure becomes your growth bottleneck
User onboarding, workspaces, org-level roles — critical code paths that drive adoption
MVP technical debt compounds with interest on every feature you ship afterward
Sprint 0
Architecture first
Multi-tenancy, data model, and billing — before the first product feature ships.
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From technical core to product features — assembled for your model and market.
Customer data isolation designed into the schema — not a patch when things break.
Solid auth, workspaces, roles, and permissions at organization scope.
The path from signup to first perceived value is a SaaS’s key metric. We design it deliberately.
Your business model encoded in the product — not maintained in parallel spreadsheets.
What your team needs to run the product without raw database access.
Infrastructure that holds under load — designed with Rehzzo Cloud when you want full control.
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Two profiles, one technical bar — MVP launch or industrialization.
You have validated the idea and need speed — without redoing everything six months later.
Internal tooling that works and you want to turn into a sellable product.
Commitments
Sprint 0
Multi-tenant architecture and data model before any product feature ships.
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Non-negotiable principles from Sprint 0 onward — so the product holds up in production.
Multi-tenant architecture and data model before product features.
Data isolation designed into the schema — not a retrofitted patch.
Dedicated SaaS infrastructure, scalable and controlled end to end.
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Two products engineered and operated by Rehzzo — real SaaS architecture, real users.
Real estate CRM SaaS
Multi-tenant B2B platform for real estate professionals — matching, property management, client portal.
Concierge SaaS
Operations tool for short-term rental concierge businesses — workflow automation, reporting, calendars.
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Every SaaS starts with a Sprint 0 focused on multi-tenant architecture and the data model — that shapes everything that follows.
The product core, iterations, and long-term operations map to Plan / Build / Run — see our Methods page for how we run each phase.
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Scoping, multi-tenant architecture, and a realistic scope before the first line of code.
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Product core, iterations, and continuous delivery on solid foundations.
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Operations, observability, and evolution in production.
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We design your SaaS on a proven product stack, then deploy it on Rehzzo Cloud — from UI to billing, from production to day-two operations.
React, NestJS, PostgreSQL, Stripe — our foundation for building robust multi-tenant applications, from UI to data model.
React
Next.js
TypeScript
Shadcn UI
NestJS
Node.js
PostgreSQL
Stripe
Docker
Every stack we build is deployed and operated on our sovereign infrastructure — Rehzzo engineering, Infomaniak datacenters in Switzerland.
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Use cases
FAQ
Use cases
Domain tools sold into one industry (HR, logistics, health, finance…)
A workflow that works in-house, turned into something you can sell
Central portal with strict isolation per organization
Shared workspaces, role permissions, real-time where needed
Consumption billing with in-product quota tracking
Taking over a codebase to fix architecture or refresh the stack
Next step
Share your idea or existing process. We respond with an honest technical read and a realistic plan.
