Case Study
Building a Full-Stack Payments Platform from Zero

Fintech

Building a Full-Stack Payments Platform from Zero

Maroo dashboard

Location

USA

Industry

Event Tech & FinTech

About the company

Maroo provides an all-in-one platform for wedding and event businesses to manage payments, contracts, and client relationships.

Provided services

AI-Accelerated Engineering
Full-Stack Development
Payments Infrastructure
Data Infrastructure

Project objective

To build a full-stack SaaS platform from the ground up — covering payments, CRM, and operations — fast enough to support a live funding round, without cutting scope on core functionality.

The problem

Challenge

The main challenge was compressing a full product build into a fraction of the usual timeline. The platform required a zero-fee ACH payment engine, CRM, contract management, e-signatures, contractor payments, 1099 e-filing, and QuickBooks integration — all production-ready on a schedule dictated by the client’s funding round.

Our approach

Solution

01

AI-Accelerated Delivery Across the SDLC

Used Claude Code for planning and implementation with project-specific conventions enforced throughout, CodeRabbit for automated PR review, and multi-agent QA verification against requirements before human sign-off — compressing the build cycle without reducing scope or cutting corners on quality.

02

Payments Engine

Built a zero-fee ACH payment engine with configurable fee pass-through, giving businesses full control over who absorbs processing costs on each transaction.

03

CRM & Contract Management

Developed a lead-to-cash pipeline covering CRM, branded quotes, contract generation, and e-signatures — letting a client convert an inquiry into a signed, invoiced deal without leaving the platform.

04

Contractor Payments & Compliance

Implemented contractor payout flows with W-9 collection on file and automated 1099-NEC preparation and e-filing to the IRS at year-end, removing the need for separate accounting software. Integrated QuickBooks for automatic transaction sync and reconciliation, connecting the platform directly to clients’ existing accounting workflows.

The lead-to-cash flow, end to end
1
Quote
2
Contract + e-sign
3
Invoice
4
Payment
The outcome

Results

$0M+
Processed on the platform since launch
0+
Wedding and event businesses onboarded
0%
Of invoices paid on time
0%
ACH fees for businesses on the platform
0
Core systems built from scratch, AI-accelerated end to end

Why it matters

Business Value

AI-accelerated delivery across the full development lifecycle compressed the build timeline while keeping the platform reliable for a high-volume, regulated payments environment.

Maroo went from zero to a production-grade payments platform fast enough to support a live funding round — without sacrificing scope or stability, positioning Maroo for continued growth.