Payment Gateway Migration & Settlement Platform

The Problem

Legacy payment gateway infrastructure was creating $1M+ in annual vendor costs, with reconciliation processes that took days and introduced errors. Multiple disconnected finance and operations systems had no single source of truth for settlement status.

My Contribution

I led the end-to-end business analysis for this payment gateway migration from a legacy vendor to a modern SaaS platform. I elicited requirements across finance, operations, compliance, and engineering stakeholders across five globally distributed teams, performed comprehensive data profiling of the existing payment transaction records, and documented source-to-target mapping for all settlement data flows. I authored the integration specification for the new payment gateway, coordinated vendor engagement, and designed the UAT framework that validated transaction integrity before cutover. The migration delivered $1M+ in savings by eliminating the legacy vendor contract.

Process

1. 1

   Discovery

   Audited existing payment workflows, mapped all integration touchpoints across finance, operations, and compliance, and identified gaps in the current reconciliation process.

2. 2

   Requirements

   Facilitated workshops with 100+ stakeholders to define the future-state settlement workflow and integration requirements for the new payment gateway.

3. 3

   Data Mapping

   Performed data profiling on legacy transaction records, documented source-to-target mapping, and defined cleansing and transformation rules.

4. 4

   Migration

   Managed phased cutover with dual-write validation period, tracking reconciliation results between old and new systems before full transition.

The Solution

Structured requirements-led migration: current-state audit, stakeholder alignment across five teams, data profiling and cleansing, source-to-target mapping, integration specifications, and a phased cutover with dual-write validation to guarantee 100% transaction integrity.

Results

• $1M+ in annual cost savings through vendor consolidation
• 30% reduction in time-to-deploy for enterprise solutions
• 100% transaction integrity maintained across migration
• Reconciliation cycle reduced from days to real-time
• Zero post-migration audit exceptions

Tech Stack