SaaS Application Development
One codebase, many tenants, and a billing system that lets people sign up without emailing you.
Scope the platform ↗
What makes a product SaaS and not just software?
SaaS means one running system serves every customer, and a new customer costs you nothing but compute. The engineering consequence is that tenancy, billing and permissions stop being features and become the spine of the architecture — every query, every background job and every export has to know which tenant it belongs to.
The two mistakes we’re usually called in to fix are the same ones every time. Either tenancy was bolted on later, so isolation depends on developers remembering a where clause; or billing was treated as a Stripe checkout button, and nobody modelled trials, upgrades mid-cycle, proration, seat changes or failed payments. Both are cheap to design in and expensive to retrofit.
What a SaaS platform includes
Tenancy model
A deliberate choice between shared schema, schema-per-tenant or database-per-tenant, with the isolation enforced in the data layer rather than by convention.
Self-serve onboarding
Signup, email verification, workspace creation, invites and a first-run path that gets someone to value without a call with sales.
Plans and entitlements
Feature flags and limits driven by the plan a tenant is on, so pricing changes are configuration rather than a release.
Subscription lifecycle
Trials, upgrades, downgrades, proration, seat counts, usage metering, dunning and cancellation — including what happens to data after churn.
Admin and support tooling
An internal console so your team can look up a tenant, impersonate safely with an audit trail, and fix a billing state without a database client.
Operational baseline
Per-tenant metrics, backups with a tested restore, structured logs and alerting tied to the paths that generate revenue.
How a SaaS build runs
Model tenants and pricing
Two to three weeks on the tenancy shape, permission model and how you intend to charge — because pricing decides the data model more than the features do.
Build the platform floor
Auth, tenancy, roles, audit logging and billing plumbing first. Unglamorous, and the thing that makes every later feature quick.
Ship the core workflow
The one job customers will pay for, built end to end for a real tenant, demoed fortnightly against your own test workspace.
Close the money loop
Live signup through to a paid invoice, tested with failed cards, mid-cycle upgrades and refunds before anyone real touches it.
Launch, then instrument retention
Onboard first tenants with feature flags for safety, then wire activation and churn signals so product decisions come from data, not opinion.
SaaS Application Development FAQ
Twelve to twenty-four weeks for a genuinely self-serve product, and it’s usually the billing edge cases rather than the core feature that set the date. If you have design partners willing to be invoiced manually, we can often get you revenue in eight.
The tools we build with
Everything here is chosen so a single small team can operate the platform on a Wednesday afternoon without a specialist for each layer.
Product surface
Next.js
React
TypeScript
TailwindPlatform & data
NestJS
Node.js
PostgreSQL
Prisma
RedisBilling & identity
Stripe
Auth0
KeycloakOAuth 2.0Run & observe
AWS
Terraform
Kubernetes
Grafana
PrometheusRelated work
Related reading
Turning your product into a platform?
Tell us how you plan to charge and who counts as a tenant. We’ll come back with an architecture, a scoped build and a date you could take money on.