Outbuiltit
my product · liveA multi-tenant WhatsApp booking SaaS for salons and spas — businesses take bookings, enquiries, and payments entirely over WhatsApp, no app install. I built it from scratch: tenant isolation on a shared TiDB (MySQL) database, a per-tenant Twilio number, a pure-function FSM bot (8 states) with a Gemini info-bot, Razorpay payment links with HMAC-verified webhooks, and a Next.js dashboard. Launched commercially, onboarding first paying tenants.

stack Next.js 16 · TiDB Cloud · Twilio · Razorpay + HMAC · Gemini · Prisma · 79 Vitest tests