SaaS development
SaaS product development, from first tenant to thousands
We build SaaS products end to end: the customer-facing app, multi-tenant data model, subscription billing, roles and permissions, integrations, admin tooling and the AI features customers now expect. Then we stay to run, fix and extend it.
The parts of SaaS that decide whether it survives
Most SaaS products do not fail on their headline feature. They fail on the plumbing around it: a billing webhook that double-provisions accounts, a missed permission check that shows one customer another customer's data, a CRM that drifts out of sync with who actually paid, an admin team that cannot help a customer without a developer.
We have built that plumbing repeatedly — subscription lifecycles, row-level security, CRM sync, audited impersonation, migrations off no-code platforms — and we build it in from the first release, because retrofitting it is far more expensive.
What we build
New SaaS products
From architecture and data model through to launch: customer app, onboarding, billing, admin portal and marketing site.
Subscription billing
Stripe or RevenueCat subscriptions with trials, tiers, upgrades, scheduled downgrades, dunning and idempotent webhooks that treat the payment provider as the source of truth.
Multi-tenancy and permissions
Tenant isolation and role-based access enforced in the database (PostgreSQL row-level security), not only in the UI.
Admin and back-office tools
Support views, audited impersonation, usage dashboards and content management, so your team can run the product without engineering tickets.
Integrations
CRMs, calendars, payment providers, SSO and webhooks — two-way sync with clear ownership of each field.
Migrations off no-code
Moving a product that has outgrown Bubble or similar tools onto a maintainable codebase, with real data migrated and reconciled.
Engineering defaults we bring to every SaaS build
Entitlements live in the database
What a customer can access is decided by Postgres policies and server-side checks, so a front-end bug cannot leak paid features or another tenant's data.
Webhooks are idempotent and order-safe
Payment and CRM events arrive late, twice or out of order. Handlers are written to produce the same result regardless.
One source of truth per fact
Billing state comes from the payment provider, identity from the auth provider, everything else from your database — never two systems that both think they own a field.
Operable from day one
Error tracking, structured logs, analytics events and admin tooling ship with the first release, not after the first outage.
SaaS products we have built
Our founder is also a senior engineer on an AI-powered EdTech SaaS platform used daily across 20+ US schools, with SSO and roster integrations, role-based apps and AI pipelines in production.
Membership platform for a mortgage-industry association: Stripe billing, CRM sync and a Bubble migration
A subscription membership platform — member dashboard, gated content, events, vendor marketplace and a 28-page admin portal — with tiered Stripe billing, a conference ticket checkout and two-way GoHighLevel CRM sync, migrated off a legacy Bubble app onto Next.js and Supabase.
Read the case studyMobile app · SaaSOur own product: a privacy-first matchmaking app on React Native and Supabase
A women-led, privacy-first matchmaking app — anonymous proposals, time-limited chats and mutual-consent identity reveal — with an iOS/Android app, API, marketing site and moderation portal in one monorepo.
Read the case studyAI integration · MCPConnecting an operations platform to Claude with a remote MCP server
A remote Model Context Protocol server that lets the consultancy's staff run their admin platform by asking Claude — invoicing, scheduling, follow-ups, time entries and contracts — with the same permissions they have in the app.
Read the case studyHow we build SaaS products
- 1
Discovery and architecture
We map users, roles, tenants, billing model and integrations, and agree on a data model before writing feature code. Expensive mistakes are cheapest to fix here.
- 2
Foundation sprint
Auth, tenancy, billing, CI/CD, environments and error tracking — the parts every later feature depends on.
- 3
Feature delivery in short cycles
Working software every one to two weeks on a staging environment you can click through, with priorities you control.
- 4
Testing and launch
Automated tests on billing, permissions and critical flows, a launch checklist, and monitoring in place before the first customer arrives.
- 5
Run and grow
Ongoing development, maintenance and support as a retained team, or a clean hand-over to your in-house engineers.
Technology we use
Frontend
- React
- Next.js (App Router)
- TypeScript
- Tailwind CSS
- React Native / Expo
Backend
- Node.js
- Python / FastAPI
- Supabase
- PostgreSQL
- Redis
Billing & integrations
- Stripe
- RevenueCat
- GoHighLevel
- Microsoft Graph
- Google APIs
- Twilio
- Resend
Infrastructure
- Vercel
- Netlify
- Google Cloud Run
- GitHub Actions
- Sentry
Deployment and operations
Your accounts, your code
Infrastructure, repositories and third-party accounts are created in your name from day one. You own everything we build.
Environments
Separate development, staging and production, with database migrations versioned and applied through CI.
Security basics done properly
Secrets in a secrets manager, least-privilege service accounts, security headers and dependency updates as routine work.
Support after launch
Bug fixes, monitoring and feature work on a monthly retainer, scoped to what you actually need.
Who this is for
- Funded founders who need a senior team to build the product, not just staff a project.
- SaaS companies whose billing, permissions or integrations have become fragile.
- Businesses turning an internal tool or service into a product they can sell.
- Teams that outgrew a no-code platform and need a proper codebase.
What drives the cost
We price SaaS work after a discovery call and a written scope. The biggest cost drivers are rarely the screens; they are the rules behind them.
- Number of user roles and permission rules
- Billing model complexity (tiers, usage-based, add-ons, invoices)
- Number and depth of third-party integrations
- Data migration from an existing system
- Compliance requirements (e.g. HIPAA, SOC 2 readiness, GDPR)
- Mobile apps alongside the web product
Further reading from our engineers
- How much does a SaaS MVP cost? What actually moves the number
Our honest range, the seven drivers that move it, what you should never cut, and the running costs that arrive after launch.
- How to add AI features to an existing SaaS without a rewrite
The engineering playbook we use to ship LLM features inside existing products: what to build first, the architecture defaults, tenancy, privacy and rollout.
Related services
SaaS Development: common questions
Tell us about your SaaS product
Tell us what you are building or what needs fixing. You will hear back from an engineer — not a sales rep — within one business day, usually with questions or a rough approach.
Your enquiry goes straight to our engineering team — the people who will scope and build your project, not a sales desk.