Reengineering the Delivery Experience: Modernizing a Legacy eCommerce Platform for Scale and Resilience

From Technical Debt to Cloud-Native Agility

In the world of global eCommerce, the delivery experience defines brand trust. Yet many high-growth enterprises still rely on legacy systems built for a slower, less connected era—systems that struggle to scale, adapt, and evolve with the business.

That was the case for a global leader in retail and logistics, whose Shipment Tracking and Control platform powered real-time customer features such as Change Delivery Address and Pre-Ship Cancel. Built on aging Perl and Mason technologies, the platform had become increasingly difficult to scale and maintain. As the company expanded worldwide, this legacy environment limited agility, slowed engineering velocity, and introduced operational risk across millions of customer interactions each day.

The Challenge:

Legacy Barriers to Innovation and Scale

The platform served as a mission-critical backbone for global fulfillment, but its monolithic architecture and technical debt created cascading constraints:

Performance Bottlenecks:
Rigid legacy components limited throughput and slowed time-to-market for new features.
Engineering Inefficiency:
High maintenance overhead and complex dependencies consumed resources that could have fueled innovation.
Limited Modernization Readiness:
Integration with emerging cloud services and newer delivery technologies required a scalable, modular foundation.

To sustain growth and maintain its delivery leadership, the organization The organization needed a modernization strategy that would preserve business continuity while unlocking agility, performance, and future-readiness across its delivery ecosystem.

Engineering What's Next:

AI-Powered Legacy Modernization

Legacy modernization is more than a technical upgrade—it’s the reinvention of your core systems for the next era of business. With AI-enabled insights and automation, enterprises are evolving legacy architectures into intelligent, adaptive platforms that move at the pace of innovation.

This guide explores the frameworks and real-world strategies that help organizations future-proof operations, eliminate technical debt, and drive measurable outcomes.

The Solution:

Legacy Modernization in Action

Aditi Consulting partnered with the client to lead a targeted modernization initiative grounded in Aditi’s Legacy Modernization Framework—a structured approach designed to assess legacy environments, architect modernization roadmaps, and accelerate transformation through intelligent replatforming and refactoring.

The engagement focused on stabilizing core systems, optimizing performance, and enabling continuous delivery through modernization best practices.

Architectural Replatforming

Aditi engineers supported the migration of the Shipment Tracking and Control platform from a Perl-based legacy environment to an AWS-native Java architecture—a strategic replatforming initiative that established a cloud-ready foundation for agility and scale.
- Enhanced platform resilience, observability, and maintainability.
- Reduced complexity by decoupling services for independent deployment.
- Improved scalability to support global transaction volumes and peak loads.

Refactoring Core Delivery Capabilities

Aditi’s modernization specialists refactored high-volume delivery features to align with cloud-native engineering principles:
- Change Delivery Address:
  Modernized for real-time address synchronization, improving precision and transaction speed.
- Pre-Ship Cancel:
  Refactored to handle concurrent workloads efficiently, reducing friction in the pre-fulfillment process.
These feature-level modernizations delivered immediate gains in reliability, responsiveness, and customer experience continuity.

Technical Debt Reduction & Modernization Readiness

The Aditi team worked to eliminate legacy dependencies, improve maintainability, and align the platform with modern DevOps practices.

This reduced recurring maintenance effort and laid the groundwork for future automation, observability, and continuous modernization initiatives across the delivery ecosystem.

The Outcome:

A Modernized Foundation for Growth

Through Aditi’s Legacy Modernization Framework, the organization transformed a complex, high-risk legacy environment into a resilient, cloud-native platform—one built to sustain continuous innovation, operational efficiency, and customer trust at global scale.

Reduced Technical debt:
By simplifying the platform architecture and retiring decades of redundant legacy code, Aditi helped the client dramatically reduce technical debt and long-term maintenance costs. The new architecture eliminated brittle dependencies and improved code reusability—allowing engineering teams to focus on innovation rather than firefighting. This optimization not only lowered total cost of ownership but also created a sustainable foundation for future product evolution.
Increased Engineering Velocity:
With modular services, cleaner codebases, and improved automation, deployment cycles were significantly expedited. The streamlined architecture reduced regression risk, improved test coverage, and enabled a faster feedback loop between development and operations teams. As a result, the organization gained measurable improvements in productivity, release frequency, and overall developer satisfaction—positioning the platform for continuous delivery.
Enhanced Scalability:
The new cloud-native architecture, optimized for AWS infrastructure, brought elasticity and performance consistency across millions of daily transactions. Dynamic scaling and distributed processing replaced the limitations of static, monolithic design—allowing the system to adapt seamlessly to fluctuating workloads without compromising response times or reliability. The organization can now scale horizontally as demand grows, future-proofing operations against both volume spikes and new feature rollouts.
Operational Resilience:
Through modernization, the platform achieved stronger stability, reliability, and performance consistency across its global operations. Improved architecture and maintainability reduced downtime risk, simplified issue resolution, and enhanced the overall health of the system. The platform now operates with greater resilience—supporting uninterrupted delivery and continuous business operations even during periods of high demand.
Customer Experience Advancement:
Most importantly, the modernization had a direct and visible impact on the end user. The platform now delivers faster, more reliable, and more intuitive delivery experiences—reinforcing customer confidence and satisfaction. Reduced latency, improved reliability, and a consistent, responsive interface elevated the user journey across millions of interactions. These improvements not only enhanced brand loyalty but also turned operational excellence into a competitive differentiator.

The Aditi Advantage:

Strategize with Our Leading Insights

Behind every transformation is a story worth telling. On our Insights page, you’ll find the strategies, lessons, and breakthroughs driving digital engineering success across major industries. From AI-powered automation to cloud modernization and data-driven decision-making, discover how organizations are overcoming challenges, accelerating growth, and preparing for the future.

Partner with Aditi to Modernize What Matters Most

Aditi’s Legacy Modernization solution package helps enterprises revitalize the systems that power their business—turning complex, high-dependency architectures into agile, cloud-ready ecosystems.

Our modernization approach combines strategy and execution through four key stages:

Assess: Evaluate application portfolios and identify modernization priorities.
Architect: Define replatforming and refactoring strategies aligned to business outcomes.
Accelerate: Deploy modernization accelerators and cross-functional engineering teams for rapid execution.
Evolve: Establish continuous modernization practices to sustain long-term agility and innovation.

Whether you’re replacing legacy systems, migrating to the cloud, or refactoring high-impact applications, Aditi brings the frameworks, accelerators, and expertise to deliver measurable modernization outcomes—at speed, at scale, and with human spirit.