SaaS Web App
SaaS Web Applications Built to Scale
Multi-tenant SaaS platforms with subscription billing, role-based dashboards, and organic acquisition built in from day one.
Most SaaS applications are built for the happy path — a single tenant, one role, no billing edge cases. Production SaaS is different: it has to handle multiple customers sharing the same database safely, subscription states (trial, active, past due, cancelled) affecting what each user can access, and dashboards that give each customer a clear view of their own data without ever leaking another customer's. Expert Sapiens is the live example — a multi-tenant platform across several brands, with subscription plans, admin dashboards, and programmatic SEO driving organic signups.
Start a project →What you get
Built for organic growth from day one
Multi-Tenant Architecture
Row-level security (RLS) in Postgres isolates each customer's data at the database level — not just in application logic. Each tenant has its own configuration, branding, and user management. Adding a new tenant is a data operation, not a deployment.
Subscription Billing with Stripe
Free trial periods, monthly and annual plans, usage-based billing, and upgrade/downgrade flows. Stripe Customer Portal for self-service subscription management. Webhook-driven state sync so access changes the moment a payment succeeds or fails — not on next login.
Role-Based Dashboards
Separate views for end users, team admins, and platform admins — each showing only what that role needs. Permission checks at the server action level, not just the UI, so restricted data is never served regardless of how the frontend is navigated.
Onboarding and Activation Flow
A new user who signs up but never activates is a lost conversion. I build onboarding flows that guide users to their first meaningful action — the point where they've seen the product's value — within the first session. Progress tracking, in-app prompts, and email sequences where needed.
Analytics and Admin Panel
Platform-level reporting (MRR, churn, active tenants, feature usage) and per-tenant dashboards. Non-technical admin interface for managing users, plans, and content without developer involvement. Built on the same stack — no third-party admin tool required.
Programmatic SEO for Organic Signups
Use-case pages, comparison pages, integration pages, and feature-specific landing pages — each targeting a query a potential customer is searching before they know your product exists. Organic signups from pSEO compound over time and reduce CAC permanently.
Live example
See it in production
Multi-tenant expert marketplace platform serving multiple brands from a single Next.js codebase. Features subscription plan management, role-based dashboards for buyers, sellers, and platform admins, Stripe Connect for marketplace payouts, and programmatic SEO across service × location pages in 6 languages. Deployed on Coolify with a GitHub Actions CI/CD pipeline.
How it works
From discovery to indexed
- 01
Discovery — 1 week
Define the tenant model, user roles, subscription plans, and the core activation metric — the action that signals a user has found real value. I map the permission matrix and billing state machine before any code is written, because these are the hardest things to change later.
- 02
Architecture — 1 week
Multi-tenant data model with RLS, Stripe product and price setup, role-based access control, and pSEO slug patterns. Auth flow including invite-based team signup and SSO if required.
- 03
Build — 6–10 weeks
Full-stack build: onboarding flow, core product feature set, subscription billing, role-based dashboards, admin panel, and pSEO landing pages. You get weekly demos and staging access throughout.
- 04
Launch & Growth — 1 week
Production deployment, Stripe webhook configuration, Search Console setup, sitemap submission, and structured data validation. Monitoring and alerting configured before go-live.
FAQ
Common questions
- What is multi-tenancy and why does it matter?
- Multi-tenancy means one deployed application serves multiple customers, each seeing only their own data. The alternative — deploying a separate instance per customer — doesn't scale. In a properly multi-tenant system, a new customer is created with a database insert, not a deployment. Row-level security in Postgres is the safest way to implement this: the isolation is enforced at the database level, not just in application code, so a bug in a query cannot accidentally expose one customer's data to another.
- How do you handle Stripe subscription billing?
- Stripe Billing manages the subscription lifecycle: trial periods, recurring charges, failed payment retries, and cancellations. I use Stripe webhooks to keep the application's subscription state in sync — so when a payment fails, access is restricted immediately, and when it succeeds, it is restored. The Stripe Customer Portal handles self-service plan changes and payment method updates without any custom UI needed.
- Can the SaaS support team members and shared workspaces?
- Yes — team-based SaaS (one subscription covering multiple users) is standard scope. The tenant model supports owner accounts, invited team members, and role-based permissions within a workspace. Invite flows with email verification, role assignment, and seat-count billing are all buildable within the standard architecture.
- What does a SaaS web application cost to build?
- A focused SaaS MVP with auth, core feature set, Stripe billing, and a basic admin panel typically falls in the $15,000–$25,000 range. Platforms with complex multi-tenancy, advanced analytics, or a marketplace layer are priced higher. Get in touch with your feature list and I'll give you an honest estimate.
- How long does a SaaS application take to build?
- A focused MVP with multi-tenancy, subscription billing, and a core feature set typically takes 8–12 weeks. More complex platforms with marketplace features, advanced reporting, or third-party integrations take 12–16 weeks. I prioritise getting the billing and permission model right in the first two weeks — those are the foundations everything else builds on.
Ready to build?
Tell me what you want to build. I'll reply within 48 hours with an honest scope and estimate.
Get in touch →