SaaS engineering
Multi-Tenant SaaS Foundations, Built to Grow
For founders and product teams building a software product, we implement the foundations that are expensive to retrofit: tenant isolation, accounts and roles, an admin area, audit history and a structure ready for a billing provider.
- Tenant data kept apart by design
- Roles that match how customers work
- Billing-ready, not billing-promised
Tenant 1
Harbor Dental Group
Plan: Team · 3 locations · 24 users
Tenant 2
Oakline Physio
Plan: Starter · 1 location · 5 users
Boundary Every query scoped to the current tenant. Cross-tenant access is tested, not assumed.
| Role | Can | Note |
|---|---|---|
| Owner | Manage billing, users and settings | One per tenant at minimum. |
| Manager | Manage records and reports for assigned locations | Cannot see billing. |
| Member | Work with records they are assigned | Read-only reports. |
Foundations first
The decisions that are hard to change later
Early product code often treats every customer as one big account. Separating tenants, adding roles or introducing an audit trail later means touching every query and screen. Getting these foundations right early lets you focus on product features with confidence.
This is part of our custom software practice, applied to products sold to many customers.
Scope and deliverables
What SaaS engineering covers
Included
- Tenancy model and isolation tests
- Accounts, roles and permissions
- Admin tooling and audit history
- Billing-provider readiness
- Scaling path
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Tenancy model
Shared database with tenant scoping, or separate schemas or databases where isolation needs justify the cost.
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Accounts and authentication
Sign-up, invitations, password reset, optional multi-factor authentication and session security.
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Roles and permissions
Role-based access that matches how your customers organize their teams.
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Admin tooling
Internal screens for support: find a tenant, view usage, manage plans, with access logged.
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Billing readiness
Plans, limits and the data structure a payment provider needs. Taking payments depends on the provider you choose and its own approval process.
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Audit history
Records of important changes, available to tenant admins and your team.
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Scaling path
Background jobs, caching and hosting choices that fit today and can grow without a rewrite.
Trust, security and oversight
Data boundaries and security
Isolation tested
Automated tests try to read and write across tenants, so isolation is verified on every change.
Least-privilege admin
Support staff access is limited, time-bound where appropriate and logged.
Data export and deletion
Tenants can be offboarded with their data exported or removed according to your policy.
Secrets and keys
Credentials kept out of code and rotated, with separate environments for development and production.
Capabilities and limits
What we deliver, and what depends on others
Can be set up to
- A multi-tenant application foundation with roles and admin tooling
- Tenant-aware data access with automated isolation tests
- Plan and limit structures ready for a billing provider
- Deployment, monitoring and documentation
Does not, by design
- Guarantee payment processing: that depends on the provider you choose and its approval
- Certify regulatory compliance for your product
- Promise a specific number of users without load testing your real workload
Fit
When it fits
A good fit when you have
- You have validated demand and need a real product foundation
- You expect multiple customer organizations with their own users
- You are prepared to invest in maintainability, not just a launch
Probably not a fit when
- You are still testing whether anyone wants the product: a prototype may be enough
- There will only ever be one customer organization
- You need a marketplace or payments business model designed first
Engagement approach
How we build a SaaS foundation
Product discovery
Customers, roles, plans and the core workflow, written down.
Tenancy and data design
The isolation model, data structure and permission rules agreed before building.
Foundation build
Accounts, roles, admin tooling and audit history, with isolation tests.
First product features
The core workflow built on the foundation in increments.
Launch readiness
Monitoring, backups, billing-provider integration if in scope, and documentation.
Which tenancy model should we choose?
Most early products do well with a shared database and strict tenant scoping, tested automatically. Separate databases offer stronger isolation at higher operating cost and suit specific requirements. We recommend based on your customers and obligations.
Can you integrate payments?
We can prepare plans and limits and integrate a payment provider of your choice. Whether and when you can take payments depends on that provider’s own approval and terms.
Can you take over an existing product?
Often. We review the codebase, tests and data model first, then recommend whether to strengthen the existing foundation or migrate parts of it.
How do you handle growth?
By choosing a design that is simple now and has a clear path to scale: background jobs, caching and hosting changes, guided by real usage rather than speculation.
Next step
Build the product on foundations that hold.
Tell us about your product, your customers and where it stands today. We will outline the foundation it needs next.
We reply by email. An inquiry is not a contract, and there is no obligation.