Modernizing Legacy Applications: Ensuring Efficiency and Security in the Cloud

  • HOME
  • News & Blog
  • Modernizing Legacy Applications: Ensuring Efficiency and Security in the Cloud

Welcome to Part 2 of our two-part blog series on Application Migration and Modernization.

Did you know that as of May 2024, nearly 60% of businesses worldwide are still using legacy applications?

In the first part of our blog series, we discussed the process of migrating applications to the cloud using agile principles. Now, let’s delve into the next step: modernizing these applications once they’re in the cloud.

Let’s first start with the challenges with legacy applications post migration to the cloud.

Common challenges with legacy applications in the cloud

Here are some of the common challenges associated with legacy applications after they have been migrated to the cloud:

  • Performance Issues: Legacy applications may not perform optimally in the cloud without some modifications. They might have been designed for a different kind of infrastructure and may not take full advantage of the cloud’s scalability and flexibility.
  • Data Migration Challenges: The process of transferring data from outdated systems to the cloud can be intricate and lengthy. There might be potential problems related to data compatibility and preservation of data integrity.
  • Security and Compliance: While cloud providers offer robust security measures, migrating to the cloud can expose vulnerabilities that are not apparent in the on-premises environment. Maintaining adherence to diverse regulations can pose its own set of difficulties.
  • Cost Management: While cloud services can potentially be more cost-effective, managing and optimizing cloud costs can be difficult, especially if the application wasn’t designed with the cloud’s pay-as-you-go model in mind.
  • Integration with Cloud Services: Legacy applications may not integrate seamlessly with other cloud services. This can limit the ability to leverage the full potential of the cloud ecosystem.
  • Skills Gap: Managing and optimizing applications in the cloud requires a different set of skills. There can be a learning curve for teams used to working with on-premises infrastructure.
  • Application Architecture: Legacy applications may use monolithic architectures that don’t work well in the cloud. Refactoring these applications to use microservices or serverless architectures can be a significant undertaking.

The need for application modernization in cloud

Application Modernization is about updating outdated software to meet today’s business needs and tech trends. It transforms legacy applications into valuable assets, enhancing their functionality and efficiency. It’s a necessity for businesses to stay competitive in the fast-paced digital world.

Benefits of modernizing legacy applications

  • Boosts Efficiency: Modernization of legacy applications streamlines processes and cuts down costs, enhancing overall efficiency.
  • Enhances Scalability: These applications, once modernized, can adapt quickly to market changes, providing superior scalability.
  • Improves User Experience: Modernization brings about faster response times and user-friendly interfaces, significantly upgrading user experience.
  • Strengthens Security: It reduces security threats linked with outdated software.
  • Promotes Innovation: Modernization allows for the integration of new technologies like AI and cloud computing, fostering innovation.

Overcoming integration issues during application modernization

  • Plan Well: Understand the existing system thoroughly to anticipate potential integration issues.
  • Go Modular: Modernize one module at a time to reduce complexity and make troubleshooting easier.
  • Use APIs: APIs can make sure smooth communication between old and new components.
  • Test Regularly: Regular testing can catch and resolve integration issues early.
  • Leverage Expertise: Use the knowledge of professionals experienced in application modernization.

Measuring the ROI of application modernization projects

  • Cost Savings: Look at the reduction in operational, maintenance, and downtime costs.
  • Revenue Growth: Track the rise in revenue from improved customer experience and quicker time-to-market.
  • Productivity Boost: Measure the productivity increase from streamlined processes and better efficiency.
  • Risk Reduction: Consider the value of reduced risks like security breaches and compliance violations.
  • Innovation: Assess the value of new business opportunities from modern technologies.

Verifying applications in the cloud

Verifying applications post-migration to the cloud is crucial to ensure their correct functioning. It helps identify and rectify any issues early, making sure smoother business operations.

Various methods and tools can be used for verification. Automated testing tools can check application performance and functionality. Monitoring tools can track system health and alert for any anomalies. Load testing can verify if the application can handle the expected user load. Regular audits can make sure compliance with security and regulatory standards.

Verification post-migration is a critical step in the cloud migration process, making sure the applications deliver the expected value.

Benefits of Application Modernization

  • Business agility: Modernization allows businesses to respond quickly to market changes. It enables faster deployment of new features and improvements, enhancing business agility.
  • Increases scalability: Modernized applications can quickly scale up or down based on demand. This flexibility supports business growth and helps manage costs effectively.
  • Enhances security: Modernization often involves updating to newer, more secure technologies. This reduces vulnerabilities and enhances the overall security of the application.
  • Reduces maintenance costs: Modernized applications are easier to maintain and require fewer resources, reducing overall maintenance costs.
  • Extends lifespan: By updating legacy applications, their lifespan is extended, protecting the initial investment and adding value over time.

Technologies for Application Modernization

Application modernization can leverage several technologies:

  • Serverless Architecture: Allows developers to focus on the application logic rather than managing servers. It provides automatic scaling and is cost-effective as you pay only for the compute time you consume.
  • Cloud-Native Databases: Designed to take advantage of cloud environments, providing scalability, resilience, and agility, which are essential for modern applications.
  • API Gateways: Acts as a bridge between legacy applications and modern systems. They provide a unified interface for integrating different services, ensuring seamless communication.
  • Container Orchestration Tools: Tools like Kubernetes manage the lifecycle of containers in a modernized application. They handle the deployment, scaling, and networking of containers.
  • Automation Tools: Streamlines the modernization process. They automate repetitive tasks, reducing errors and speeding up the development cycle.


Embrace the journey of application modernization today! Don’t let your applications lag behind in the fast-paced digital world. Start strategizing your post-migration plans now for a more secure and efficient digital future. Remember, the key to a successful digital transformation lies in your hands. Act now!


Let's get in touch and tackle your business challenges together.


We love a challenge. So do the 400 cloud experts at Intwo.


Rest assured. We've got you.