Cloud SaaS Backends

Scalable cloud SaaS backends engineered with isolated tenant data and automated billing.

Launch your software venture on bulletproof architecture. Complete multi-tenant infrastructure with Postgres row-level security, role-based access, and automated Stripe subscription billing.

Tenant Isolation100%Postgres Row-Level Security (RLS)

Stripe ReadyBilling & InvoicesAutomated recurring subscriptions

Delivery14–21 DaysFirst working MVP in 72h

Code Ownership100% IPZero proprietary framework lock-in

Book a call→Explore How We Build↓

Poorly architected SaaS backends leak data and cost a fortune to rewrite.

Hacking together a software product with loose database filters leads to catastrophic security leaks where Tenant A sees Tenant B's confidential data. Rewriting a broken backend post-launch takes months and risks your company's reputation.

Traditional Agency & Off-The-Shelf Way

×Relying on developers to remember 'where tenant_id = x' on every query, causing data leaks.
×Clunky manual invoicing and billing headaches when customers change plans.
×Single shared database bottlenecks that slow down for everyone when one client has high usage.
×Giving up 20% equity to an agency or being trapped in their proprietary platform.

The Cossence Studio Way

✓PostgreSQL Row-Level Security enforced at the database level so data cross-contamination is impossible.
✓Automated Stripe billing with self-serve customer portal, seat upgrades, and invoice generation.
✓Scalable cloud database architecture with read replicas and tenant connection pooling.
✓100% source code ownership from day one, built on modern open standards you control.

Built for speed, accuracy, and effortless scale.

Every system is architected from clean fundamentals with zero unnecessary bloat and 100% intellectual property ownership.

Bank-Grade Security

Postgres Row-Level Security (RLS)

Guarantees complete tenant data isolation at the database layer. No risk of accidental cross-tenant data leaks.

Stripe Ready

Automated Stripe Subscription Billing

Self-serve customer portal for plan upgrades, seat-based add-ons, monthly/annual tiers, and automated invoice receipts.

Granular RBAC

Enterprise Role-Based Access (RBAC)

Granular user roles (Owner, Admin, Member, Read-Only) with customizable team permissions and audit logging.

SSO Ready

Single Sign-On (SSO) & Social Auth

Seamless authentication supporting Google, GitHub, Magic Links, and enterprise SAML / Okta SSO.

Custom Domains

Custom Domains & Multi-Tenant Routing

Support for custom client domains (e.g., app.client.com) with automated SSL provisioning via Cloudflare.

Complete IP

Complete Code & Database Ownership

Built with modern TypeScript, Next.js/Node.js, and Postgres that you own completely. Zero proprietary vendor dependencies.

From architecture lock to production in 14 days.

No multi-month delays or agency bureaucracy. You receive your first testable working build within 72 hours of kickoff.

Sprint 01Days 1–3

Schema Lock & Working Multi-Tenant MVP

We design the relational database schema, configure Postgres RLS policies, and deploy a working multi-tenant login build in 72 hours.

Sprint 02Days 4–12

Core Workflows & Stripe Integration

We build out your core application features, integrate Stripe subscription billing, and configure email notification webhooks.

Sprint 03Days 13–18

Security Audit & Production Handover

We run vulnerability scans, test tenant isolation boundaries, configure automated database backups, and transfer 100% code ownership.

Engineered for businesses where reliability matters.

Concrete commercial outcomes engineered across high-velocity industries.

B2B Vertical SaaS Platforms

Rapid ARR Growth

Industry-specific software (legal, dental, automotive) serving hundreds of separate business accounts securely.

Internal Enterprise Dashboards

Clean Compliance

Multi-department internal tools allowing different subsidiaries or teams to manage their data in isolated partitions.

Client Portal & Agency Systems

Elevated Brand

White-labeled customer portals where agencies manage client deliverables, approvals, and invoices in one place.

Marketplaces & Booking Platforms

Automated Payouts

Multi-vendor systems where service providers manage schedules, process client payments, and track payout balances.

Everything you receive on Handover Day.

Complete ownership from day one. You receive full code repositories, cloud configurations, and documentation with zero recurring software licenses.

✓Complete source code repository with 100% intellectual property ownership

✓PostgreSQL database schema with verified Row-Level Security (RLS) tenant isolation

✓Stripe customer portal integration for recurring billing, invoices, and seat upgrades

✓Authentication system with email, OAuth, and optional enterprise SAML/SSO

✓Clean REST or GraphQL API with auto-generated OpenAPI documentation

✓30 days of production warranty and database performance support

Frequently asked questions.

Transparent answers regarding our 14-day delivery sprints, code ownership, maintenance SLAs, and scoping.

Have a specific question?

Speak directly with the lead engineer assigned to your build.

Ask our engineers directly→

How does Row-Level Security (RLS) prevent data leaks between tenants?

RLS is enforced by the PostgreSQL database engine itself, not your application code. Even if a developer accidentally forgets a filter, the database will refuse to return any rows belonging to another organization.

Can clients have their own custom subdomains (e.g., company.ourdomain.com)?

Yes! We can configure dynamic subdomain routing and automated SSL certificate generation so every customer gets their own branded URL.

How does Stripe billing handle upgrades, downgrades, and cancellations?

We use Stripe's official billing engine with webhook synchronization. Plan upgrades prorate automatically, cancellations remain active until the end of the billing period, and failed payments trigger automatic retry emails.

What happens as our SaaS scales from 10 customers to 10,000?

Because we build on proven relational architecture (PostgreSQL) with connection pooling and stateless API containers, scaling simply involves adjusting database replica tiers without needing to rewrite your code.

Do we own the software code and intellectual property?

Yes, 100%. You own every single line of code, database migration, and design asset. We take zero equity, zero recurring royalties, and enforce zero platform lock-in.

Schedule a 20-minute scoping review for Multi-Tenant SaaS Architecture.

Speak directly with our senior systems engineers. We analyze your live workflows, provide mutual NDA coverage, and return a fixed-price architectural delivery plan within 24 hours.

Book a call→Back to Home

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