December 8, 2025

40% Less Cost, 100% More Value in Fintech Legacy System Modernization

The Challenge Our client needed to modernize its legacy PHP-based Account Revenue Solution (ARS), a core module within its Retail Performance Engine. The existing monolithic …

The Challenge

Our client needed to modernize its legacy PHP-based Account Revenue Solution (ARS), a core module within its Retail Performance Engine. The existing monolithic system was slow and limited the ability to release new features quickly.

The primary objective was to transform this legacy system into a modern, agile platform within a hard deadline of 15 months without disrupting the live, revenue-generating programs of their banking clients.

Key problems included:

  • Aggressive Timeline & Resource Constraints: The 15-month deadline made building a large, permanent in-house team impractical. Our client needed a partner that could rapidly ramp up a skilled team, deliver efficiently, and ramp down seamlessly post-project without the long-term overhead.
  • Technical Debt: A monolithic PHP codebase that slowed development to a crawl, increased the risk of errors, and limited auditability.
  • Competitive Pressure: An outdated UI/UX and slow feature delivery limited the product’s competitive edge in the market.
  • Compliance & Stability: The need to meet rising compliance demands with a system that lacked transparency, while ensuring a seamless transition with zero downtime.

The Solution

To meet the aggressive 15-month deadline, CMC Global deployed a strategic hybrid engagement model. We began by onboarding a core leadership team (Project Manager, Technical Lead, and Business Analyst) during the Planning phase to establish a solid foundation.

After one month, we rapidly ramped up the full scrum team to execute the development plan. Our technical approach was defined by a risk-mitigated, modular strategy:

  • Modular Architecture & Incremental Modernization: We deconstructed the legacy PHP monolith into independent, API-ready modular services to modernize, test, and deploy the system piece by piece.
  • Seamless Coexistence & Auditability: The new React-based front-end and modular back-end were designed to work seamlessly with the legacy system during the transition. We embedded comprehensive audit trails from the start, directly addressing critical banking compliance requirements.
  • Resilient Execution: The team successfully managed the complex transition from the old MVC UI to a modern RemixJS (React) framework, delivering 119 features across 136 user stories.

The Outcome

Building on this streamlined process, the project achieved measurable success across three key areas:

  • 40% development cost savings
  • 100% Client Satisfaction Score
  • 99% On-schedule sprint completion rate