How we built a multi-tenant SaaS for Indian SMBs using React + Firebase
How We Built a Multi-Tenant SaaS for Indian SMBs Using React 19 + Firebase + Razorpay I'm Narendra, a developer from Rahuri, Ahmednagar, Maharashtra. Over the past year I built Muttha Finance — a digital ledger SaaS for Indian shopkeepers, wholesalers and traders. This post covers the technical decisions, architecture, and lessons learned building a production multi-tenant SaaS from scratch. Live app: https://app.mutthasales.in The Problem We Were Solving Indian wholesale traders run their entire business on paper registers called "Khatavni" or "Bahi Khata". Every trader tracks: Daily income and expense Party-wise accounts (customers + suppliers) Post-dated cheques Staff activity Paper fails them constantly — lost registers, calculation errors, no access control, no backups. Existing apps like Khatabook solved basic udhaar (credit tracking) but missed the bigger picture. We built the complete solution. Tech Stack
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