Ryanair’s Legacy Web App Modernization for 3x Faster Performance
Overview
Euristiq helped Europe’s largest airline with the legacy modernization of a new, user-centered version of the Ryanair web app — a digital platform for buying tickets, booking accommodation and renting cars.
Following our successful collaboration on the migration of the legacy system from Adobe Experience Manager to the AWS Cloud, the results were both tangible and transformative. The platform’s performance experienced a remarkable boost, with faster loading times and greater efficiency in serving customer needs. The enhanced interoperability of the platform also streamlined internal processes, optimizing the airline’s overall operations. The work has since grown into a multi-project partnership, with a senior Euristiq team working alongside the airline’s own developers.
visitors per day on the platform — around 53.3 million visits a year
passengers, making Ryanair Europe’s leading airline by passenger numbers
customer satisfaction rate reported by Ryanair (January 2025 statistics)
The airline’s legacy web
app was slowing the business down
An outdated, monolithic build
The platform could not be updated section by section — any change meant redeploying the whole system, which held back ticketing, accommodation and car-rental features.
Slow performance at huge scale
Serving roughly 3 million visitors a day, the web app’s loading speed directly affected user experience, conversion and revenue.
Limited interoperability
Adding third-party tools took months, not weeks — a real constraint for a business that needs to test, personalize and integrate continuously.
Adobe Experience Manager constraints
The legacy system ran on Adobe Experience Manager, limiting scalability and the ability to adopt modern cloud-native servic
Key outcomes we delivered
A re-engineered web app with 3× faster performance and a new UI/UX
Since the previous platform had become outdated, it needed new life. Euristiq introduced a complete UI/UX overhaul and re-architected the web app, delivered as senior-level custom application development embedded alongside the airline’s own team.
Micro front-end architecture and custom apps
Euristiq changed the architectural approach and implemented a micro front-end architecture, which allows different parts of the application to be deployed separately with no need to redeploy the whole system. This substantially improves the platform’s maintainability and availability. Interoperability was another critical requirement: Euristiq integrated LaunchDarkly for A/B testing, Boxever for user personalization, Hotjar for UX analytics and New Relic for technical analytics. Similar third-party tools can now be integrated in weeks, not months.
New, user-centered UI/UX
A fresh, intuitive and visually appealing design brought the web app up to current industry standards and reflected the airline’s commitment to an engaging, seamless online experience across ticketing, accommodation and car rental.
AWS Cloud adoption and DevOps
The team relocated the infrastructure to AWS and set up AWS DevOps services to support reliable, repeatable deployments — the operational backbone for the new micro front-end architecture.
Senior team extension
Rather than a hands-off delivery, Euristiq embedded senior engineers as an extension of the airline’s team — accessible despite being remote, and able to move fast on scope that spanned architecture, front end and cloud. That model is what turned a single project into an ongoing partnership.
Migration from Adobe Experience Manager to AWS
Full infrastructure moved to AWS for scale and reliability
Micro front-end architecture for independent, low-risk deployments
Delivered by a certified AWS Advanced Tier Services Partner
Faster, user centered, independent
3× faster platform
Time to user interaction improved threefold versus the previous iteration.
Independent deploys
Sections ship separately, improving availability and reducing release risk.
AWS + micro front-end
Migration to AWS Cloud with a new UX/UI and micro front-end architecture.
Weeks, not months
New third-party tools integrate in weeks thanks to the new architecture.
13× on slow 3G
Page speed improved 13× on Chrome’s slow 3G preset.
Higher conversion
Faster, smoother experience lifted conversion and revenue across services.
A web platform serving millions of bookings
Work with a team
that’s done this before
to AWS migration? Share your scope and we’ll come back with a recommended approach,
an indicative timeline and the senior team we’d put on
FAQ
How does legacy modernization improve web app performance?
Legacy modernization improves web app performance by replacing an outdated architecture with a modern, cloud-native one tuned for speed and scale. In this legacy modernization case study, Euristiq re-engineered Ryanair’s web app, migrated it from Adobe Experience Manager to AWS Cloud, and rebuilt the front end with micro front-end architecture and a new UX/UI. The platform now opens 3× faster than the previous version, and page speed on Chrome’s slow 3G preset improved by 13×. Faster load times lifted the user experience and supported higher conversion and revenue across ticketing and ancillary services.
What is micro front-end architecture and why use it for a large web app?
Micro front-end architecture splits a large web application into independent parts that can be built, tested and deployed separately, without redeploying the whole system. Euristiq applied it in the Ryanair legacy modernization so ticketing, accommodation and car-rental sections could ship on their own schedules. For a high-traffic airline platform serving roughly 3 million visitors a day, this raises availability and maintainability: a change to one section carries no risk to the rest, and new third-party components can be integrated far more quickly than the previous monolithic build allowed.
How do you migrate a web app from Adobe Experience Manager to AWS?
You migrate from Adobe Experience Manager to AWS by relocating the full infrastructure to AWS Cloud rather than lifting the old CMS across as-is. For Ryanair, Euristiq moved Europe’s largest airline web app off Adobe Experience Manager and re-engineered the front end into a micro front-end architecture running on AWS. The migration decoupled deployments, improved scalability and interoperability, and let the team add third-party tools such as LaunchDarkly, Boxever, Hotjar and New Relic in weeks instead of months. The result was a platform that loads 3× faster and up to 13× faster on a slow 3G connection.
What does a legacy modernization engagement with Euristiq look like?
A legacy modernization engagement with Euristiq starts with discovery: we scope your web app or platform, define the target architecture and agree the performance characteristics to hit — the same approach that framed the Ryanair project. From there we embed a senior-level team that works alongside your own, so you gain velocity without losing control. Typical workstreams are architecture engineering, UX/UI, front-end development, AWS Cloud adoption and third-party integrations, delivered iteratively so value ships early. Share your scope and we’ll come back with a recommended approach, an indicative timeline and the team we’d put on it.
Recent cases
Digital Identity Verification with 100% PII Protection
Corporate Travel Booking Software That Doubled Bookings and Cut Failed Payments by 34%
