Application modernization services

Application modernization services that start with an audit

An old application holds years of business rules: discounts for specific customers, exceptions in pricing, reports someone checks every Monday. Many of them are not written down anywhere except in the code. Before recommending a rewrite, we read the code, the data and the integrations, and talk to the people who use and support the system.

The audit ends with a plan: which parts to rebuild, which to refactor, which to keep, what each step costs and what could go wrong. You can use the plan on its own or continue with us.

Legacy application modernization in parts, not in one big bang

A complete rewrite stops improvements for months and puts everything at risk on the day of the switch. We replace the application one workflow at a time. The new part runs next to the old one, uses the same data and URLs, and takes over when it has proven itself with real users.

For North Suburban Limousine, we rebuilt the booking application with a Next.js frontend and a Symfony API, replacing the older Yii-based system. Customers enter their trip, choose a vehicle and see a price breakdown before saving a card; staff manage trips, payments, destinations, vehicle types and discount codes in one administration interface.

Data migration you can verify

Data is where modernization projects fail quietly. We map the old structure to the new one, clean up duplicates with you and run the migration repeatedly on copies of production data. Counts, totals and spot checks show that customers, orders and history arrived intact. North Suburban Limousine’s data was migrated from the previous system before the new version launched.

E-commerce migration from Magento and WooCommerce

Stores built on Magento or WooCommerce often become expensive to update and slow to extend. We move the catalog, customers, order history and content to a new platform or a custom storefront, keep product content and structured data, and redirect every old URL so rankings follow. See custom e-commerce and B2B ordering for what the new store can do for manufacturers and distributors.

Moving to the cloud as part of modernization

Modernization is often the right moment to leave an aging server. We plan the hosting together with the application, so the new version is built for its environment rather than lifted into it. Chicago Boat Company’s reservation platform, first built in 2014, was rebuilt in 2024 to bring the Chicago Electric Boat Company and Chicago Cycleboats projects into one platform, and runs on AWS. See cloud consulting and development on AWS.

Modernization with a clear finish line

Each milestone ends with something running in production: a rebuilt workflow, migrated data or a retired server. You own the code and documentation, and the old system is switched off only when nothing depends on it anymore. For connecting the new application to the rest of your systems, see API development and system integration.