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radicalsoft

SaaS & Product Development

SaaS foundations built to carry a business, not just a launch.

A SaaS product succeeds or stalls on decisions made early: how tenants are isolated, how plans and billing work, how permissions grow. We design those foundations deliberately, then build the product on top of them.

What we build

What this service covers, in detail.

Multi-tenant SaaS platforms with workspaces, billing, permissions and the admin tooling to run them.

  1. 01

    SaaS architecture

    Service boundaries, data model and deployment topology sized to your stage, with a path to scale.

  2. 02

    Multi-tenancy

    Tenant isolation using row-level security, schemas or databases, chosen against your compliance and cost needs.

  3. 03

    Users and workspaces

    Invitations, teams, roles and workspace switching that behave the way customers expect.

  4. 04

    Authentication and permissions

    SSO, MFA, role and attribute based access, enforced on the server for every request.

  5. 05

    Subscription plans

    Plans, trials, upgrades, downgrades and entitlements modelled once and reused across the product.

  6. 06

    Billing integrations

    Invoices, taxes, proration and dunning through a licensed billing provider, reconciled with your records.

  7. 07

    Usage metering

    Accurate metering for seats, API calls or compute that feeds both billing and customer dashboards.

  8. 08

    Admin dashboards

    Internal tools for support, account management and operations with safe impersonation and audit trails.

  9. 09

    Audit logs and notifications

    Who did what and when, plus email and in-app notifications driven by the same events.

  10. 10

    API design

    Versioned, documented APIs and webhooks that let customers integrate with the product.

  11. 11

    Scaling and maintainability

    Caching, queues, observability and test coverage that keep delivery fast as the codebase grows.

Example use cases

Where teams put this to work.

  • 01

    New SaaS from an idea

    Discovery, design and a production-quality first release that you can sell and iterate on.

  • 02

    Internal tool to product

    Turn a tool built for one company into a multi-tenant product others can subscribe to.

  • 03

    Usage-based pricing

    Meter real consumption and bill accurately for it, with customer-facing usage views.

  • 04

    Enterprise readiness

    Add SSO, audit logs and granular roles so larger customers can approve the product.

Technical approach

Tools we typically use here.

A starting point, not a mandate. We adapt to your existing stack and constraints.

How we choose technology
  • Next.js
  • TypeScript
  • Node.js
  • PostgreSQL
  • Neon
  • Drizzle ORM
  • Redis
  • Stripe Billing
  • OpenTelemetry

How it works

The engagement, step by step.

  1. 1

    Product and model workshop

    Define users, tenants, plans and the first release boundary.

  2. 2

    Foundations first

    Auth, tenancy, billing hooks, design system and pipelines before feature work.

  3. 3

    Vertical slices

    Complete features shipped end to end each cycle, never half-layers.

  4. 4

    Harden

    Load, security and recovery checks plus accessibility review.

  5. 5

    Launch and operate

    Staged release with monitoring, then a backlog driven by usage.

FAQ

Frequently asked questions

Which tenancy model should we choose?

Row-level isolation suits most products and keeps cost low. Separate schemas or databases suit stricter isolation needs. We recommend per case.

Can you take over an existing SaaS codebase?

Yes. We begin with an architecture and risk review, then agree whether to extend, refactor or rebuild parts.

Do you handle billing yourselves?

We integrate a licensed billing provider rather than building payment processing, and we reconcile it with your data.

Planning a SaaS & Product Development project?

Tell us the problem you are solving. We will reply with questions, options and a realistic next step.