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SmartyDevs
Engineering · 02

SaaS engineered for revenue.

Multi-tenancy, billing, plans, seats, usage metering, admin and audit — the unglamorous infrastructure that turns a feature into a sellable product.

§ 01The problem

The problem we solve

Founders frequently underestimate everything between “the app works” and “the app can be sold.” Tenant isolation, plan gating, seat management, usage-based billing, admin tooling, audit logs, role-based access — these compound into months of work that nobody scoped. We've built this layer enough times to know where the sharp edges are.

§ 02Capabilities

What we ship

  • 01Multi-tenant architecture (schema-per-tenant or row-level, per your scale)
  • 02Plans, seats, usage metering and entitlements engine
  • 03Stripe billing with proration, dunning, invoicing and revenue recognition
  • 04Authentication with SSO (SAML, OIDC), MFA and session controls
  • 05Role-based access control with audit logs out of the box
  • 06Admin / impersonation tooling for your support team
  • 07Workspace invitations, transfers and lifecycle management
  • 08Webhooks, API keys and developer-facing surfaces
  • 09Tenant-aware observability and per-tenant rate limiting
  • 10Compliance-ready data isolation patterns
§ 03Deliverables

What you receive

  • Production SaaS application owned by you
  • Billing operations runbook — refunds, plan changes, dunning
  • Admin tooling your support and ops teams can actually use
  • Documented entitlements model your product team can extend
§ 04Stack

Stack we reach for

TypeScript
Next.js · React
Node.js · Python
Postgres · row-level security
Stripe Billing
Clerk · WorkOS · Auth0
Redis
Inngest · Temporal
OpenFGA · Cerbos
PostHog · Mixpanel
§ 05Ideal for

Ideal for

  • Founders launching their first paid B2B product
  • Companies moving from a single-tenant pilot to multi-tenant SaaS
  • Teams adding enterprise features (SSO, audit, RBAC) for upmarket motion
  • Products graduating from per-seat to usage-based pricing
§ 06Process

How an engagement runs

  1. 01

    Plan model & entitlements

    We start with the commercial model — plans, features, limits. Everything downstream depends on getting this right on paper.

  2. 02

    Tenancy & data isolation

    Schema and access patterns chosen for your scale. Row-level security where it fits; schema-per-tenant where compliance demands it.

  3. 03

    Billing integration

    Stripe (or equivalent) integrated against your plan model. Proration, dunning, trials, invoicing, all wired correctly.

  4. 04

    Admin & operations

    Impersonation, audit, refunds, support tooling. The infrastructure your team needs to run the business on day one.

  5. 05

    Launch & warranty

    Production launch with monitoring, 30-day warranty, and documentation your engineers can extend.

§ 07Engagement

How to engage

01

Discovery Sprint

2 weeks

Commercial model, tenancy decision, billing architecture and scope for the build.

02

Fixed-Scope Build

8 — 14 weeks

End-to-end SaaS foundation: multi-tenancy, auth, billing, admin, ready for paying customers.

03

Embedded Team

3 — 9 months

Continuing work on plan expansion, enterprise readiness and the long tail of SaaS edge cases.

§ 08Common questions

Frequently asked.

01Do you use a SaaS starter kit?

We use our own internal patterns and a few well-supported open-source primitives. We do not lock you into any third-party platform we couldn't replace in a week.

02Can you migrate our existing single-tenant app to multi-tenant?

Yes — this is a substantial chunk of the work we do. We start with a discovery sprint that produces a written migration plan with risk assessment.

03What about enterprise readiness — SSO, SOC 2, audit logs?

We build these into the SaaS foundation by default. SOC 2 readiness is a separate engagement, but the engineering it depends on is the same engineering we ship here.

Have a problem worth solving well?

Tell us the outcome you want. We'll tell you what it takes — honestly, within a week, in writing.

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