Build Your SaaS Platform
Multi-tenant SaaS from zero to launch — architecture, build, deploy.
Let's Fix ThisThe Problem
You have a validated idea and maybe even paying users on a spreadsheet or MVP, but turning that into a real multi-tenant platform feels overwhelming. You need authentication, billing, tenant isolation, and an architecture that won't collapse at 100 users.
I built Sellanto from the ground up as a multi-tenant SaaS platform, so I've lived through every decision you're about to face — tenant isolation strategy (shared database with row-level security vs. schema-per-tenant), subscription billing with Stripe including trials, upgrades, downgrades, and failed payment handling, role-based access control that actually works for teams, and infrastructure that auto-scales without bankrupting you at low volume. The technology choices matter enormously at this stage. I typically build SaaS platforms with Next.js and React on the frontend, Node.js or Python on the backend, PostgreSQL for the database (its row-level security is purpose-built for multi-tenancy), and deploy on Vercel or AWS depending on requirements. Authentication uses battle-tested providers like NextAuth or Clerk rather than hand-rolled auth that becomes a security liability. Every SaaS has the same core infrastructure needs: user management, team invitations, billing portal, usage tracking, admin dashboard, transactional emails, and webhook integrations. I've built all of these before and have proven patterns for each. The goal is to get your unique value proposition in front of users fast, without cutting corners on the infrastructure that will bite you at scale.
Ideal For
- —Founders with a validated idea ready to build their first product
- —Businesses turning an internal tool into a commercial SaaS product
- —Startups that have outgrown their no-code MVP and need real infrastructure
- —Companies with domain expertise looking for a technical co-builder
How I Build It
- 01Define your data model, tenant strategy, and core feature set
- 02Architect the platform with proper auth, roles, and billing integration
- 03Build the MVP with the features that matter most to early users
- 04Set up CI/CD, monitoring, and scalable infrastructure
- 05Launch, onboard first customers, and iterate based on feedback
This solution is part of my Custom Web Applications service.
Recommended Reading
What You Get
Frequently Asked Questions
How long does it take to build and launch a SaaS MVP?
A focused MVP with core features, authentication, billing, and a polished UI typically takes 8-12 weeks. The key is ruthlessly scoping the first version to the features your early users actually need. I help you prioritize so we ship fast without building features nobody uses.
What tech stack do you recommend for SaaS?
For most SaaS products, I recommend Next.js with React, PostgreSQL, and deployment on Vercel or AWS. This gives you server-side rendering for SEO, API routes for your backend, excellent developer experience for future hires, and a massive ecosystem. For real-time features, I add WebSocket support with tools like Pusher or Ably.
How do you handle subscription billing and pricing changes?
I integrate Stripe Billing with proper webhook handling for every event — successful payments, failed charges, subscription upgrades, downgrades, cancellations, and trial expirations. The system handles proration automatically so customers are charged fairly when they change plans mid-cycle.
Ready to solve this?
Tell me about your situation and I'll propose the right approach.