6 Million Lines of Legacy Code.
Zero Downtime. 7,000 Users Live.

A platform too critical to take offline, modernized while it kept running.

    The Scale of the Challenge

    What the team was up against before a single line was touched

    6M+
    Lines of Legacy Code

    A codebase that had grown for years, undocumented, unmapped, and structurally coupled in ways even the team couldn't fully trace.

    475
    Stored Procedures

    Spread across four mission-critical modules, with dependencies running deep into how the business actually operated day to day.

    1,546
    SP Call Graphs, Unmapped

    Cross-module relationships invisible to the team going in, the kind of complexity that usually surfaces only after something breaks.

    A Platform That Couldn't Go Offline,
    Not Even for an Hour

    The technology underpinning the business had quietly become its greatest strategic risk, not because it was failing, but because no one could safely touch it. Every workaround added now meant more risk later. The real constraint wasn’t the code. It was the 7,000 people relying on it every day, with zero room for disruption.

    This wasn’t a pilot running alongside the business. It was the business, being rebuilt from the inside while it stayed live.

    How 7,000 Users Never Noticed

    The full breakdown, the approach, the phases, the team, and the results is in the case study.

    What’s new from ​EXIQO™

    Human-in-the-Loop. Scaling AI Without Losing Control

    Human-in-the-Loop. Scaling AI Without Losing Control

    Artificial intelligence is growing up. Not long ago, most enterprise…

    R Systems launches EXIQO™

    R Systems launches EXIQO™

    EXIQO™, the AI Studio by R Systems combines enterprise context,…

    We are R Systems

    RSI is a trusted software engineering and digital transformation services partner to global enterprises navigating technological change. RSI enables technology companies, SaaS platforms, and enterprises to solve real-world challenges, accelerate time to market, and scale AI-driven innovation across the full software development lifecycle and business automation. With proven AI fluency at every layer of the technology stack, RSI helps clients not only adopt AI, but operationalize it, embedding intelligence into products, platforms, and processes. RSI’s AI Studio, EXIQO, brings together AIEV-trained engineers (RSI’s proficiency-based certification framework across AI, to drive engineering velocity) and the enterprise-ready Optima AI platform to orchestrate and deliver AI-led transformation.