Building a B2B SaaS Product with Next.js and Supabase

When I started building the Gauge Management Platform at Calispec, I quickly learned that B2B SaaS is a different beast from consumer products.

The Multi-Tenant Problem

Every B2B SaaS needs multi-tenancy. With Supabase and Row Level Security (RLS), I could enforce tenant isolation at the database level — no application-layer bugs could leak data across organizations.

ALTER TABLE gauges ENABLE ROW LEVEL SECURITY;
CREATE POLICY "Users see own org data" ON gauges
  USING (org_id = auth.jwt()->>'org_id');

Real-Time Dashboards

Supabase's real-time subscriptions made building live calibration status dashboards straightforward.

Key Takeaways

1. Design for multi-tenancy from day one — retrofitting is painful 2. RLS is your best friend for security 3. TypeScript + Supabase's generated types eliminates entire classes of bugs 4. Invest early in good abstractions for pagination and filtering