Multi-tenant platforms with real billing, roles and usage metering, engineered for the second year rather than just the launch.
Almost every hard problem in SaaS engineering is a decision made in the first month. How tenancy is isolated, how the billing model maps to the data model, and how permissions are expressed all become nearly immovable once real customers are on the platform.
Tenancy in particular. Retrofitting isolation into a schema that assumed one customer is one of the most expensive migrations in software, and it always arrives at the worst time, usually when an enterprise prospect sends a security questionnaire.
So we make those decisions deliberately and early, with the growth path written down. Everything else in a SaaS build is ordinary product work, and it moves quickly once the foundations are not fighting you. Whether you call it SaaS product development or SaaS application development services, the sequence is the same: settle tenancy, billing and permissions, then build the product on top of foundations that are not fighting you.
Teams that start here often pair it with custom SaaS development, web app development and MVP development.
Nobody has ever regretted designing tenancy properly in month one. Plenty of teams have paid for the alternative during their first enterprise deal.
Four foundations that decide whether year two is growth or rework.
A tenant column added late with filtering left to application code, so one missing clause becomes a cross-customer data leak.
Subscription state lives in the payment provider and the product guesses, so upgrades, proration and failed payments produce support tickets.
Roles expressed as scattered flags rather than a model, so every enterprise permissions request becomes a refactor.
No per-tenant usage data, so heavy customers are unprofitable and nobody can tell which ones.
The foundations, the product, and the operational tooling to run it.
Isolation model chosen against your compliance and scale requirements, enforced in the data layer rather than in application code.
Plans, trials, upgrades, proration, dunning and failed payments handled as first-class product states rather than webhook side effects.
A permission model with organisations, teams and roles, ready for the SSO and audit requirements enterprise buyers bring.
Per-tenant measurement of the resources that scope you money, feeding both billing and profitability reporting.
Internal tools for support and success teams to impersonate, adjust plans and diagnose without database access.
CI/CD, monitoring, backups and tested restores, with runbooks your team can follow at 3am.
Foundations first, then features, then scale.
Tenancy, billing model, permissions and the growth path agreed and documented before feature work starts.
Auth, organisations, roles, billing and metering shipped in the first sprints because everything else assumes them.
Fortnightly increments of the core product with a usable release each time.
Load testing at realistic tenant counts, security review, backup and restore rehearsal.
Staged rollout with monitoring and rollback, then handover with runbooks and documentation.
Chosen for hiring pool and support horizon, not novelty.
One typed codebase across server and client so a small team ships without a services sprawl.
Postgres with row-level security so tenancy is enforced by the database, not by remembering a where clause.
Subscription state modelled in your database and reconciled with the provider, never inferred from it.
Your cloud accounts, automated deploys, monitored backups with tested restores.
An HR platform with two hundred small customers landed a prospect fifty times larger than anything on the platform. The security questionnaire asked how tenant data was isolated, and the honest answer was a where clause in application code.
Because tenancy had been designed with row-level security in the database from the first sprint, the answer was demonstrable rather than aspirational. We added SSO, audit logging and per-tenant data export during the evaluation.
The deal closed in eleven weeks. The same foundations then carried a further four enterprise customers without further architectural work.
Tenancy, billing and permissions are decided in week one with the growth path written down, because these are the three things nobody can cheaply change later.
Tenancy is enforced by row-level security in Postgres, so a forgotten filter in application code cannot leak another customer data.
A working demo and a written note every Friday covering what shipped, what slipped and what it means for the date. No status theatre.
Nothing goes live in one jump. We run in parallel or behind a flag until the numbers say it is safe to switch over.