SaaS · Backend Architecture

SaaS Platform Foundation

Production SaaS foundations with clear backend boundaries — auth, data modelling, payments and product workflows designed so features can ship without destabilising the platform.

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StackTypeScript · Node.js · Next.js · Stripe
FocusBackend boundaries · product workflows
TypeSaaS platform
RoleFull-stack engineering

The problem

Early SaaS codebases often collapse under their own shortcuts. This engagement needed foundations that could carry a real product roadmap: predictable data, clear module boundaries and payments that behave.

What we built

  • A modular monolith with explicit module boundaries instead of tangled endpoints.
  • Typed contracts shared between front-end and backend.
  • Authentication, session handling and permission checks at the boundary.
  • Stripe integration with webhook handling and idempotent subscription logic.
  • Cloud infrastructure and CI/CD sized for a small team.

Outcome

A platform foundation where new features slot into place, and where the safest place to add logic is also the obvious one.

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