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·4 weeks
B2B SaaS MVP · 0 → paying customer in 4 weeks
Scoped and shipped a B2B SaaS MVP for a Hungarian founder in 4 weeks. Multi-tenant RLS, Stripe Billing, Clerk auth, AI-powered core loop. First paying customer in week 5.
THE PROBLEM
[1/3]
- 01Founder had ~12 weeks of runway · MVP had to generate revenue signal before burn-out.
- 02Initial scope from the founder was 10× what was shippable in 4 weeks.
- 03Multi-tenant with enterprise-grade isolation couldn't be a 'later' · customers 2 + 3 asked immediately.
- 04AI was the core differentiator · but it couldn't be a cost black hole.
THE SOLUTION
[2/3]
- MVP scope worksheet · cut 7 of 10 proposed features, focused on 3 that resolved the target pain.
- Postgres RLS from day 1 · tenant isolation baked in.
- Stripe Billing with 3-tier pricing (free / pro / enterprise).
- AI feature behind a daily credit budget · prevents runaway cost at bad-faith usage.
- Clerk for auth · SSO ready for enterprise tier on day one.
Technologies
Next.jsClerkStripe BillingPostgres RLSOpenAI
THE OUTCOME
[3/3]
- 01First paying customer: week 5.
- 02Month 3: €2,400 MRR, 18 paying seats.
- 03Zero data incidents · RLS held across 12 tenants.
- 04Founder reached the Series seed round on schedule.