05Multi-tenant SaaS

Cosmos Tutorial

A multi-tenant B2B platform for coaching institutes — students, fees, attendance and a parent app — built and shipped solo.
Client
Cosmos Tutorial · B2B SaaS
Year
2024 — now
Visit live sitecosmostutorial.com · App Store
cosmostutorial.com

The build

The proof that this studio ships real products, not just sites. A full multi-tenant SaaS: an admin portal for institutes plus an Expo parent app on iOS and Android. Institute-level data isolation enforced by 52 RLS policies over 18 database functions, AI-generated progress reports, signed-URL study materials and push notifications — built solo in roughly six months, live on the App Store.

The standout

Multi-tenant isolation done properly: 52 row-level-security policies, staging/production separation, Sentry monitoring and a full CI/CD pipeline — one founder, end to end.

The outcome

Live on the App Store — a multi-tenant SaaS with a parent app on iOS & Android, built solo in roughly six months.

Discipline

ProductFull-StackMobileInfra

Built with

Next.js 14Expo React Native (iOS + Android)Supabase · 52 RLS policiesPostgreSQLGemini AI (reports)Expo PushGitHub Actions · EAS · VercelSentry

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Every build starts with one conversation and one point of contact — the founder who wrote this code. Tell me what you have in mind.