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MVP for a new SaaS productFinTech

MVP for FinTech Startup

Client:PayFlow (Stealth Startup)
Industry:FinTech
Duration:6 weeks

Key Result

Live with paying customers in 6 weeks

The Challenge

A non-technical founder had an idea for a B2B payment reconciliation tool but needed to validate it with real customers before raising a seed round. They needed an MVP that looked professional, worked reliably, and could handle real transactions - but didn't need every feature pla

ed for the full product.

Our Solution

We delivered a lean, focused MVP that:

Allows businesses to upload bank statements and invoicesnAutomatically matches transactions using smart algorithmsnFlags discrepancies for reviewn Includes basic user authentication and role-based accessnIntegrates with Stripe for billing pilot customers

Built with Next.js, PostgreSQL, Stripe, and Plaid for bank co

ections. Clean UI that looks like a mature product despite being v1.

Technologies Used

Next.jsTypeScriptPostgreSQLStripePlaid APIVercel

The Results

Shipped in 6 weeks from kickoff to production:

3 paying pilot customers in first monthnUsed to process $50K+ in reconciliations in first 2 months

Founder used the working product + early traction to secure $800K seed round

MVP is still in production serving customers while v2 is being built by their new in-house team.

"SJK helped me go from idea to paying customers in 6 weeks. The MVP they built was crucial in raising our seed round. Clean code, solid architecture, and most importantly - it worked."

Jessica Park

Founder & CEO, PayFlow

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