Case study · Software startups
From promising MVP to a product customers pay for
Many SaaS founders have an MVP that proved demand but was never built to scale. This is how we took it to a solid version 1: multi-tenant architecture, subscription billing, security, onboarding and the engineering foundations for the next stage.
Project overview
Productising an MVP into a scalable SaaS v1.
- Industry
- Software startups
- Client
- Confidential
- Solution
- SaaS v1
- Architecture
- Multi-tenant
- Timeline
- 16–24 weeks
- Team
- 6 people
- Billing
- Stripe subscriptions
- Security
- SSO, roles, audit
- Hosting
- Azure or AWS
Expected business outcomes
What the client set out to gain
Readiness for growth is the goal, measured in practical terms.
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Self-serve
Customer onboarding
Sign-up, trial and billing without manual setup.
Where the product suits self-serve
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Enterprise-ready
Security basics
SSO, roles, audit logs and data isolation.
Checked against common security questionnaires
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Weekly
Release cadence
CI/CD and automated tests make releases routine.
Cadence once the foundations were in place
Business challenges
Where the client started
It works for ten customers; it won't for a thousand.
Architecture
Single-tenant or copied databases per customer.
Billing
Invoices sent manually.
Onboarding
Each customer set up by the founders.
Security
Basic login, no roles or audit trail.
Engineering
No tests, manual deployments, one developer who knows everything.
Proposed solution
What version 1 covers
Product features and engineering foundations together.
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Multi-tenancy
Tenant isolation designed into data, APIs and permissions.
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Subscription billing
Plans, trials, upgrades and invoices through Stripe.
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Self-serve onboarding
Sign-up, guided setup and in-app help.
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Security
SSO, roles, audit logs and encryption.
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Engineering foundations
CI/CD, automated tests, environments and monitoring.
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Product analytics
Usage tracking to guide the roadmap.
Project requirements
What the client asked us for
The request was to rebuild properly. We recommended evolving the MVP rather than rewriting it, keeping what works and replacing what blocks growth.
Security and billing come early, because enterprise customers and revenue depend on them.
What the project had to deliver
- 01Tenancy done properly
- 02Billing that runs itself
- 03Customers onboard themselves
- 04Releases without fear
Key challenges & considerations
What made it harder, and what we did
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Live customers on the MVP
What we did
The MVP was evolved in place, so paying customers were never interrupted.
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Data migration to the new tenancy model
What we did
Data was migrated to the tenant model in rehearsed steps.
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Founders' time for product decisions
What we did
Decisions were batched into a short weekly session with the founders.
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Fundraising milestones
What we did
Releases were planned around the fundraising milestones.
What we watched for
- Evolve before you rewrite
- Design tenancy early
- Automate billing
- Invest in tests before scaling
Development process
Evolve, don't restart
Customers keep working while the product is strengthened.
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Assessment
Code, architecture and product reviewed.
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Foundations
CI/CD, tests and environments set up.
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Tenancy and security
Multi-tenancy, SSO and roles introduced.
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Billing and onboarding
Self-serve sign-up and billing launched.
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Migration and scale
Existing customers migrated; monitoring in place.
Technology stack
A SaaS stack built to scale
Proven, boring technology where it matters.
Front end
- React or Next.js
- TypeScript
- Accessible design system
Back end
- Node.js or .NET
- PostgreSQL or SQL Server
- REST / GraphQL APIs
Cloud
- Azure or AWS
- Managed databases
- CDN
Quality
- Automated tests
- CI/CD
- Monitoring and alerts
Quality assurance & deployment
Tested as a product many customers share
A SaaS product is one codebase serving every customer, so a defect reaches all of them at once. Tenant isolation, billing and upgrades were tested as deliberately as the features.
- Automated unit and API tests, run on every change
- Tenant isolation tests: one customer can never see another's data
- Billing, plan and permission scenarios tested end to end
- Code review by a second engineer before anything was merged
- Load tests at the expected number of tenants and users
Deployment
- 01Billing and onboardingSelf-serve sign-up and billing launched.
- 02Migration and scaleExisting customers migrated; monitoring in place.
- 03Releases without downtimeUpdates shipped behind feature flags, with database changes that can be rolled back.
- 04Monitoring and warrantyUptime, errors and usage per tenant monitored from day one, and six months of free bug fixing.
Final deliverables
A product ready for its next hundred customers
Customers sign up, pay and onboard themselves, enterprise buyers find the security they expect, and the team releases every week.
The founders stop being the onboarding team.
- Multi-tenant architecture
- Self-serve billing
- Enterprise security basics
- Routine releases
Handed over to the client
- 01Production SaaS platformMulti-tenant, deployed and monitored
- 02Source codeIn a repository the client can access
- 03Billing and admin consolePlans, tenants and permissions
- 04Test suite and pipelineIncluding tenant isolation tests
- 05Six-month warrantyFree bug fixing after delivery
Success metrics
How success is measured
| Measure | Outcome | How it is measured |
|---|---|---|
| Customer onboarding | Self-serve | Where the product suits self-serve |
| Security basics | Enterprise-ready | Checked against common security questionnaires |
| Release cadence | Weekly | Cadence once the foundations were in place |
Verified reviews
What clients say about our web development work
Verified reviews from our clients on the same kind of work, published on Clutch.
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Web Development
Custom Web Development for a Software Solutions Company
We can rely on them to handle almost any task with confidence, as they consistently deliver good results.
Casper Hougaard Jensen
CEO & Co-Founder, Iterator IT Jul 2021 – Sep 2022
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Web Development
Web & Mobile App Development for a Software Development Company
They efficiently organized tasks and deliverables while promptly addressing questions.
Damien Retzinger
Founder, Graycore Jun 2021 – Feb 2023
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Web Development
Website Development for a Software Engineering Company
They have a broad understanding of different technologies.
Eugene Bosikov CEO, Ezibeline LLC Mar 2022 – Ongoing Verified review on Clutch (Eugene Bosikov, opens in a new tab)
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