Leveraging GenAI to Modernise Legacy Systems

Today, legacy systems often find themselves teetering on the edge of obsolescence, plagued by frequent downtime and the looming specter of financial losses. According to a market study conducted by Hitachi Vantara, more than 40% of businesses suffer revenue setbacks due to the constraints imposed by legacy systems and outdated technologies.

Today’s businesses face a stark choice: evolve or risk irrelevance. This imperative is particularly pronounced for those still tethered to antiquated software solutions. Forrester reports that between 70% to 90% of these legacy systems will demand significant overhauls within the next five years, underscoring the urgent need for transformation.

The approach to modernizing legacy applications varies, spanning from complete rewrites to strategic re-hosting based on factors such as value, criticality, and organizational objectives. Despite the inevitability of application modernization, many Chief Information Officers (CIOs) and Chief Technology Officers (CTOs) hesitate to commit resources due to concerns about cost and project timelines, as highlighted by IBM.

This blog aims to delve into the transformative potential of GenAI and how it can be harnessed to expedite project timelines and streamline costs in the modernization journey.

7 Signs Your Application Needs Modernization

Aging applications pose a significant threat to business growth, often leading to failures and performance issues. A striking example is the grounding of flights at Orly airport in Paris in 2015 due to the failure of the DECOR systems, crucial for communicating weather conditions to pilots. Remarkably, these systems were still running on Windows 3.1, released in 1992. To avoid such setbacks, it’s crucial to recognize the signs indicating the need for application modernization. 

7 Signs Your Application Needs Modernization

7 Signs Your Application Needs Modernization
  1. Slow performance
  2. Security vulnerabilities 
  3. Excessive hardware dependency 
  4. Frequent system crashes 
  5. Higher maintenance cost
  6. Compliance issues 
  7. Incompatibility with modern systems 

Why Does Your Legacy System Need Modernization?

Software isn’t like a fine wine; it doesn’t get better with age. It’s more like a pet – it needs constant attention and the occasional makeover. After all, as your business grows, your software needs to keep pace.

Software development and implementation are not static endeavors; they demand continuous updates and maintenance to remain effective. Over time, the evolving needs of your business may necessitate a significant overhaul or even a complete redesign of your software to ensure compatibility and relevance. 

Through our experience with modernization projects, we’ve witnessed firsthand the pressing reasons driving businesses towards legacy modernization: scalability, reliability, and the escalating financial burdens associated with maintaining outdated systems.

Here are three compelling reasons we advocate for legacy system modernization.

Security Concerns 

    Security concerns are a major issue with older systems. They’re essentially an invitation for trouble, like leaving the front door wide open. Legacy apps often lack the latest security updates, making them easy targets for hackers.

    But when we decide to modernize these systems, it’s like fortifying our defenses. We update everything, from patching up vulnerabilities to adding encryption. Additionally, we beef up authentication and access controls. It’s not just about protecting data; it’s also about meeting regulations and maintaining trust.

    With modernization, we thoroughly test for weaknesses and keep a vigilant eye on things, so we’re prepared for anything. Ultimately, it’s all about prioritizing safety and safeguarding our reputation.

    Higher Maintenance Cost

      Outdated infrastructure and manual maintenance processes drain resources, driving up operational expenses. By modernizing, organizations can optimize resource utilization through cloud services and automation, slashing labor costs. Scalable architectures like microservices enable dynamic scaling, eliminating the need for costly over-provisioning. 

      Additionally, addressing technical debt through refactoring and modularization reduces complexity and maintenance efforts. Faster time to market through agile methodologies further minimizes maintenance overhead, ensuring the application remains competitive. Ultimately, prioritizing maintenance cost reduction not only yields immediate financial benefits but also lays the groundwork for long-term sustainability and innovation.

      Learn how a food bank reached 170,000 people by modernizing its legacy application 

      Better Accessibility

        Modernizing legacy applications goes beyond mere interface updates; it’s about fundamentally transforming accessibility. By embracing inclusive design principles and leveraging new technologies, organizations can make their applications truly accessible to all users. This involves more than just adding basic accessibility features—it requires a deep understanding of diverse user needs. 

        Cloud-based architectures and responsive design techniques ensure seamless access across various devices and platforms, while localization and internationalization capabilities cater to global audiences. Prioritizing accessibility isn’t just about compliance; it’s about fostering inclusivity, enhancing user satisfaction, and unlocking new opportunities for engagement and growth. 

        GenAI In Legacy Application Modernization

        Businesses recognizing the need for legacy system modernization, are compelled to seek solutions that not only address the challenges of outdated infrastructure but also pave the way for future-proof digital transformation. 

        This is where Generative Artificial Intelligence (GenAI) emerges as a solution. By leveraging GenAI, organizations can improve efficiency, accelerate development cycles, and ultimately reap the maximum benefit of their modernization initiatives. 

        Here are six ways how GenAI can be of help in legacy application modernization.

        1. Automated code refactoring 
        2. Intelligent testing automation 
        3. NLP for requirements gathering
        4. Data analysis & insights 
        5. Monitoring & Predictive maintenance
        6. UX Enhancements
        1. Automated Code Refactoring 

        Leveraging GenAI in modernization projects offers advanced capabilities that streamline and optimize the process. It facilitates automated code refactoring by creating dynamic refactoring and migration plans through simulations, analyzing dependencies, and exploring various scenarios. 

        It also assists in navigating the complexities of legacy migration by projecting the consequences of code changes and mitigating the risk of unexpected issues. Additionally, it accelerates the identification of refactoring opportunities, prioritizes tasks based on impact analysis, and generates optimized code snippets. 

        By leveraging GenAI, organizations can modernize legacy applications more efficiently, ensuring the resulting codebase aligns with current best practices and architectural standards. This not only improves maintainability and scalability but also accelerates time-to-market.

        1. Intelligent Testing Automation 

        GenAI is a game-changer when it comes to testing in legacy app modernization projects. It takes the hassle out of testing by automating the whole process. From generating test cases to running them across different setups, GenAI does it all. Plus, it learns from past tests to predict where things might go wrong in the future. 

        That means fewer surprises down the road. It’s like having a super-smart assistant that keeps an eye on everything for you. And the best part? It adapts on the fly, so your tests are always up-to-date and effective. With GenAI handling testing, you can speed up the modernization process, ensure your apps are rock-solid, and focus on what really matters—delivering great experiences to your users.

        1. NLP For Requirements Gathering

        GenAI can be a game-changer for gathering requirements. By employing NLP techniques, GenAI parses documentation, user feedback, and other sources to extract requirements accurately. This automated process saves significant time and effort, ensuring a comprehensive understanding of the application’s functionality and user needs. 

        GenAI can also analyze historical data to identify patterns and trends, further refining the requirements-gathering process. Additionally, it assists in translating technical jargon into user-friendly language, facilitating communication between stakeholders with varying levels of technical expertise. 

        With GenAI handling requirements gathering, you can bet the new app will hit the mark, meeting user expectations, and business goals, and ensuring a smoother ride for all involved.

        1. Data Analysis & Insights 

        In modernization projects, GenAI can harness machine learning algorithms to analyze vast amounts of legacy data, identifying usage patterns, performance bottlenecks, and areas for optimization. By extracting valuable insights from historical data, GenAI informs decision-making and guides modernization efforts, prioritizing areas with the highest impact.

        Furthermore, it also facilitates predictive analytics, enabling organizations to anticipate potential issues and proactively implement preventive measures. This predictive capability minimizes downtime, enhances system reliability, and reduces ongoing maintenance costs.

        Moreover, GenAI empowers organizations to optimize resource allocation, identify opportunities for cost savings, and improve operational efficiency. By leveraging data-driven insights, organizations can make informed decisions throughout the modernization process, ensuring that resources are allocated effectively to achieve desired outcomes.

        1. Monitoring & Predictive maintenance

        In legacy app modernization projects, GenAI can be of help in monitoring and predictive maintenance, ensuring optimal performance and reliability. GenAI employs advanced analytics to monitor application health in real time, identifying anomalies and performance bottlenecks before they escalate into critical issues. 

        By analyzing historical data and user behavior patterns, GenAI can predict potential failures and recommend proactive maintenance measures. Additionally, it leverages machine learning algorithms to continuously optimize system parameters and configurations, enhancing efficiency and reducing downtime. Moreover, GenAI enables predictive scaling, automatically adjusting resources based on anticipated demand to ensure seamless user experience and cost-effectiveness. 

        1. UX Enhancements

        GenAI can significantly contribute to enhancing user experience (UX) by leveraging advanced capabilities tailored to address specific UX challenges. Firstly, GenAI analyzes user interactions, feedback, and preferences to generate personalized recommendations and optimize user interfaces for improved usability. By understanding user behavior, GenAI helps in identifying pain points and areas for enhancement, guiding UX redesign efforts effectively.

        Moreover, GenAI employs machine learning algorithms to predict user preferences and behaviors, enabling the creation of intuitive and responsive interfaces that adapt to individual user needs. This enhances user satisfaction and engagement, driving higher adoption rates and improved user retention.

        Additionally, GenAI facilitates the rapid prototyping of UX designs by generating design variations and simulating user interactions. This iterative approach allows for quick experimentation and refinement, ensuring that the final UX design meets user expectations and business objectives.


        While modernization initiatives are imperative for businesses to stay competitive, they are not without their challenges. Concerns about potential disruptions, and necessary alterations to the operating model are valid considerations. 

        Though Generative AI is not a one-stop solution for these complexities, it undeniably enhances the success of modernization programs. It accelerates the process, reduces costs, and mitigates risks by ensuring critical functionality isn’t overlooked.

        Yet, introducing large language models (LLM) and related libraries into the enterprise environment demands significant time and effort. Rigorous security and compliance reviews are necessary to mitigate potential risks. By embracing generative AI within a comprehensive modernization strategy, businesses can overcome these challenges more effectively. For assistance in navigating these complexities of your digital transformation journey, get in touch with us today.