March Code
Financial technology

Payment System MVP with Banking API Integrations

An MVP of a payment platform with KYC/AML verification, multi-currency transfers and banking API integrations. We launched it in 3.5 months, in time for an investor demo day, and after the demo day the startup closed its seed round.

Client: FinTech MVPFintechSaaS
Payment System MVP with Banking API Integrations

3.5 mo

from idea to a working MVP

10K+

transactions in the first month of beta

0

KYC/AML issues raised by partner banks

01

Challenge

A fintech startup had an investor demo day in 4 months. By then it had to show a working product with real transactions, or the round would fall through. The job: take the idea from the founder's head to a live platform investors could actually get their hands on.

The hard part wasn't the development itself but the fintech requirements: KYC verification compliant with 152-FZ (Russia's personal data law) and AML rules, PCI DSS for card handling, integration with Stripe and Russian banking APIs, data encryption and an audit log for every operation. One security slip, and investors get up and leave.

At the same time, the MVP couldn't get bloated: extra features meant missed deadlines. We had to build a minimum viable product on the right architecture, one that could grow later instead of being rewritten.

02

Solution

We built the MVP in 3.5 months, 2 weeks ahead of demo day. The architecture was designed for growth from the start: microservices, queues, a separate verification service, an isolated PCI zone.

What went into the MVP:

  • Sign-up and KYC: document upload, passport recognition from a photo, registry checks, manual review of borderline cases
  • Account top-ups by card via Stripe and by bank transfer (Russian banks through a host-to-host integration)
  • Instant transfers between platform users, with fees and limits applied
  • Withdrawals to a card or bank account, confirmed with 2FA
  • AML monitoring with rules that flag suspicious activity: split payments, unusual amounts, geography
  • An admin panel for KYC review, AML alert investigation and manual control of transactions

Security: PCI DSS certification, data encryption (AES-256 at rest, TLS 1.3 in transit), 2FA for users, immutable audit logs of every operation with a digital signature.

We worked in 2-week iterations. Each one delivered working functionality that the founder showed to potential investors to gather feedback before demo day.

04

Results

3.5 mo

from idea to a working MVP

A working platform with KYC/AML, Stripe and PCI DSS was ready in 3.5 months, 2 weeks ahead of the investor demo day

10K+

transactions in the first month of beta

Without a single failure in the payment module and with no AML incidents

0

KYC/AML issues raised by partner banks

Verification and compliance were designed around banking API requirements from day one, not "bolted on later"

Project technologies

ReactNode.jsStripePostgreSQL

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