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Solution

AI-powered custom application modernization

Modernize to grow. Modernize to save. Modernize to lead.

AI-powered custom application modernization is no longer a luxury – it’s a necessity. For speed. For resilience. For results.

AI-Powered legacy transformation

Capgemini accelerates every stage of modernization – rapidly assessing your application landscape, transforming legacy systems and embedding intelligent agents for continuous improvement and measurable business value.

Outcomes:

  • Reduce technical debt
  • Lower IT costs
  • Faster time-to-market
  • Improved security
  • Scalable, agile application estate

We guide you to the right path – retire, replatform, refactor, or hybrid – based on business priorities.

AI Powers Faster App Modernization

Modernize applications faster and deliver more value, powered by AI

Capgemini named a Leader in The Forrester Wave™

Application Modernization and Multicloud Managed Services, Q1 2025

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A pragmatic approach to modernization

Every organization has a different starting point.

Capgemini helps identify the highest-value modernization opportunities and determine the right path forward whether to retire, replatform, refactor, rewrite, or combine approaches based on business priorities, risk, and strategic ambition.

Our approach combines AI-powered acceleration with deep modernization expertise across four connected stages.

Key components of sustainable modernization

Navigate: Identify high-impact opportunities

Quickly understand your entire application landscape. Using AI-powered tools, Capgemini rapidly maps legacy systems, analyzes dependencies and prioritizes modernization paths based on business value and technical need. Get clear, actionable insights – no guesswork.

Modernize at speed. Capgemini’s AI agents refactor code, replatform applications and migrate workloads to cloud-native environments, as well as infusing AI to drive increased client value. Our accelerators and partner incentives cut costs and complexity, making transformation scalable and efficient.

Modernization without compromise. Capgemini uses AI to automate test generation, regression validation and ensure performance – ensuring every update is secure, stable and production-ready. Quality is integrated from the start.

Modernization is ongoing. Capgemini’s RAISE for custom application modernization monitor code health, reduce technical debt and optimize performance – turning your software estate into a self-improving, resilient foundation for future growth.

Client stories

Top consumer goods company streamlines processes with Power Platform

Capgemini creates dozens of custom business applications to automate arduous processes, enabling the company to focus on high-priority work

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BMW Data Connectivity

Premium OEM provides global vehicle-backend connectivity via cloud-based platform

Capgemini supported in the development and operation of essential vehicle connectivity services

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HMRC-Capgemini Tax Transition

HMRC migrates its mission-critical SAP Platform to Microsoft Azure

HMRC transitions its tax and revenue management platform to the Microsoft Azure cloud environment. One of the largest migrations of its kind.

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Custom business applications

At Capgemini, we make only one type of custom apps: the type that gets results. Effective by design!

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Latest insights

Point of view

Modern Software Engineering: Building the next generation software organization
Point of view

Enterprise low-code: Your lever for business acceleration and application modernization
Point of view

How to measure the impact of Gen AI on software coding and unit testing?
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Report

Gen AI in software

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Point of view

Redefining software engineering: The impact of generative AI

Partners

Meet our experts

Joao Zorro

João Zorro

Application Modernization Offer Leader, Cloud and Custom Applications
Since joining Capgemini over ten years ago João has held several roles for the Group. Notably leading the UK Microsoft Application and Cloud engineering capability and the Dynamics 365 team. In his current role as Application Modernization Offer Leader for the Cloud & Custom Applications Global Business Line, João helps clients worldwide ensure they benefit from a modernized Application estate that delivers the highest business value possible for their organization.
Stuart Ball

Stuart Ball

Head of Strategy & Offers, Global Cloud & Custom Applications (C&CA)
Stuart Ball is an Executive Vice President at Capgemini, leveraging extensive leadership experience to help clients drive technology-led transformation and achieve measurable operational improvement. With senior roles across Capgemini and prior consulting positions, he brings deep expertise in delivering solutions that accelerate business performance.
Stéphane Girard

Stéphane Girard

Global Cloud and Custom Applications CTO, Capgemini  
I am an experienced Chief Architect and Chief Technology Officer with a demonstrated history of working in the information technology and services industry. I help our clients from design to delivery at scale.
Tim Lüecke

Tim Lüecke

Delivery Architect Director, Cloud and Custom Applications
With more than 15 years’ experience in custom software development and architecture, Tim has helped organizations modernize complex application landscapes and mission-critical systems at scale. In his role as Delivery Architect Director within Capgemini’s Cloud & Custom Applications business, he specializes in application modernization, software engineering and the application of AI to accelerate transformation, helping clients reduce technical debt and unlock greater business value from their technology investments.