Multi-tenant SaaS Platform | Enterprise Organization Management

Wladimir

Wladimir Filho

🧩 The Challenge

Organizations struggled with fragmented team collaboration tools and lacked transparent cost management for their projects.
The solution needed to address:
Multi-tenant architecture supporting unlimited organizations with custom domains.
Advanced role-based access control requiring granular permissions (ADMIN, MEMBER, BILLING).
Transparent billing system with automated cost calculation and usage tracking.
Scalable infrastructure capable of handling enterprise workloads.
Developer-friendly platform with modern tooling and comprehensive documentation.

✨ The Solution

I architected and implemented a full-stack SaaS platform using modern technologies
arctheture diagram
arctheture diagram

šŸ› ļø Deep Dive

The platform features a monorepo structure with Turbo for optimized builds. The frontend uses Next.js 15 with React 19, featuring modern UI components and a seamless user experience.
The backend is powered by Fastify with TypeScript, featuring comprehensive OpenAPI documentation, JWT authentication, and a CASL-based authorization system. PostgreSQL with Prisma ORM ensures type-safe database operations.
Infrastructure is fully automated with Terraform, deployed on AWS EKS with auto-scaling (HPA), and includes a comprehensive CI/CD pipeline with GitHub Actions and OIDC authentication.
The billing system automatically calculates costs ($20/project + $10/seat) with real-time usage tracking and detailed reporting.

šŸŽ‰ The Outcome

The platform delivers enterprise-grade SaaS capabilities with modern architecture:
āœ“ Multi-tenant architecture supporting unlimited organizations with custom branding. āœ“ Advanced RBAC system with granular permissions and seamless team collaboration. āœ“ Transparent billing system with automated cost calculation and usage tracking. āœ“ Production-ready infrastructure with auto-scaling and high availability. āœ“ Comprehensive security with container hardening and network policies. āœ“ Developer-friendly platform with type safety, hot reload, and automated documentation.
Like this project

Posted Oct 9, 2025

I architected and built a production-ready SaaS platform with advanced RBAC, automated billing, and AWS infrastructure.