Multi-tenant SaaS platforms built for scale — subscription billing, user roles and permissions, admin dashboards, usage metering and the infrastructure to support a growing customer base. We build SaaS products from MVP to production-ready, and take over existing codebases that need refactoring or scaling.
A successful SaaS platform must be multi-tenant from the first commit. Architectural decisions regarding data isolation, tenant partitioning, and subscription state cannot be retrofitted right before launch without painful rewrites. Our SaaS platform development services deliver production-grade architectures designed from day one to handle rapid user onboarding, automated tier provisioning, and high concurrency.
Built on Next.js, React, Node.js and PostgreSQL, with Stripe for billing and deployment on AWS or Vercel, we engineer robust multi-tenant architecture, subscription billing pipelines, role-based access control (RBAC), admin dashboards, and real-time usage metering. Whether launching a greenfield SaaS MVP or taking over an existing codebase that requires refactoring and scaling, you receive 100% full source code ownership with no recurring proprietary fees or vendor lock-in.
From multi-tenant data architecture and Stripe billing to RBAC permissions, usage metering, and MVP delivery.
A sample multi-tenant subscription architecture illustrating our full-stack SaaS engineering approach.
A growing B2B analytics startup needed to replace a single-tenant prototype with a scalable, multi-tenant SaaS architecture capable of handling tiered subscription billing, organization-level member invitations, and automated usage quotas.
Engineered a robust multi-tenant SaaS platform with PostgreSQL row-level security (RLS), Stripe Billing integration (supporting monthly/annual tiers, seat licensing, and proration), granular role-based permissions, and a comprehensive master admin console.
Delivered an enterprise-ready SaaS platform supporting self-serve customer onboarding, instant provisioning, zero cross-tenant data leakage, and full client IP code ownership.
Answers to common questions regarding our SaaS development capabilities, Stripe billing, multi-tenancy, and codebase handoffs.
Technical blueprints, architecture breakdowns and implementation guides from our engineering team.
Production architecture patterns and best practices for building scalable multi-tenant SaaS applications using Supabase RLS and the Next.js framework.
Master Next.js 16 Server Actions and React Server Components for building scalable real-time data synchronization pipelines with optimistic UI updates.
Whether you're starting from an MVP or scaling an existing platform — tell us what you're building. We scope every project individually and provide fixed-price quotes within 24 hours.
Or email info@psi-square.net · Phone +44 (0) 20 3872 7195 · We reply within 24 hours · NDA available on request