




Fit-Stack - Multi-Tenant B2B Gym SaaS, AI Assistant & Hardware Access Control
High-performance B2B SaaS platform for gym operations, financial auditability, AI assistance, and physical access control. Engineered as a Turborepo monorepo featuring an Edge Serverless API on Cloudflare Workers using Hono, a serverless Neon Postgres database powered by Drizzle ORM, Upstash Redis edge caching, and an AI Chat engine with real-time SSE streaming leveraging Cloudflare Workers AI and OpenRouter models. Comprises a Gym Admin Panel (Next.js 16 / React 19) with cumulative renewal logic and multi-currency billing; a SaaS Super-Admin Console (Next.js 16); a Member Portal (Next.js 16) with dynamic CMS rendering; full monorepo test suite with Vitest; asynchronous task queues via Cloudflare Queues and Resend transactional emails; and a native Desktop Bridge (Python / Flet) for turnstile hardware integration via biometric/QR sensors. Infrastructure fully managed via Terraform and deployed with GitHub Actions CI/CD pipelines.























