Development of a B2B FinTech System for Invoicing and Online Payments
FinanceA case study of building an MVP FinTech solution for B2B companies: invoice creation, online payments via Stripe, payment status tracking, and an architecture ready to scale in the global market.
About the Project
FinTech / B2B SaaS • Web • Invoicing Platform
Invohub is a SaaS platform built for companies that need a fast and convenient way to issue invoices, accept online payments, track payment statuses, and manage reminders and analytics.
The platform is based on direct payment provider integrations. At the MVP stage, we implemented integration with Stripe, while keeping the architecture flexible enough to support additional payment providers in the future.
The product was designed for the global market and companies serving clients worldwide.
Business Challenge
The client needed to validate the product hypothesis quickly and launch a minimum viable version of the platform in a short timeframe.
Core MVP goals:
- Enable companies to connect their own Stripe accounts
- Implement the full invoice lifecycle — from creation to payment
- Provide customers with a simple and secure payment flow
- Deliver baseline analytics and payment monitoring
- Prepare the architecture for future scaling
MVP Functionality
For Businesses
- •Account registration and management
- •Connecting a company’s own Stripe account
- •Invoice creation and management
- •Sending invoices to customers via link
- •Tracking statuses (created, sent, paid, overdue)
- •Invoice and payment analytics
- •Configuring payment reminders for customers
For End Customers
- •Accessing a public invoice page via link
- •Viewing full service and amount details
- •Secure online payment via Stripe without registration
Technical Implementation
The platform was built as a modern web application with a clear separation of responsibilities between the frontend and backend.
Frontend (React, TypeScript)
User interfaces for businesses and public invoice pages for end customers.
Backend (Node.js, TypeScript)
Business logic, invoice workflows, Stripe API integration, and webhook handling.
Database (MongoDB)
Storage for company data, invoices, statuses, and payment events.
Containerization (Docker)
Simplified deployment and preparation for scaling.
The UI design was provided by the client and implemented by our team as part of the MVP delivery.
Project Team
From the 2people IT side, the project team included:
Project Manager
Planning, coordination, and client communication
Frontend Developer
Implementation of the user interface
Backend Developer
Business logic and Stripe integration
QA Engineer
Validation of correctness and MVP stability
Results
Within 3 months, we delivered the MVP version of the Invohub platform, covering the full core workflow for invoicing and online payments.
The project enabled the client to:
Validate the product hypothesis
In the international market
Receive a solid architectural foundation
For further development
Move quickly toward building an internal team
And scaling the product further
After the MVP phase was completed, the project was handed over to the client for further development by their in-house team.
Technology Stack
Frontend
Backend
Database
Integrations
DevOps
Project Links
Invohub platform and the client’s website:
Summary
Invohub is a strong example of bringing a FinTech product to market quickly: a sharp MVP focus, just-enough functionality, and an architecture ready for growth and future payment provider integrations.
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