Engineering & Platforms
Legacy Application Migration
Moving applications and their data from old platforms, servers or hosting environments to new ones, such as on-premises to cloud, old databases to current versions or retired platforms to supported equivalents, with minimal downtime.
Capability overview
What legacy application migration involves
Sometimes an application does not need redesigning, it needs a new home. The server hardware is failing, the operating system is out of support, the hosting contract is ending or the database version is years behind. Legacy application migration moves the application and its data safely, keeping behaviour the same while removing platform risk.
Migrations are planned around dependencies that are easy to miss: hard-coded server names, scheduled tasks, file shares, email relays, licence keys tied to hardware and integrations configured years ago. Data migration includes validation counts and checksums, and cutover is rehearsed so the real switch happens within an agreed maintenance window.
What is included
Migration scenarios
Server and hosting migration
Applications moved from ageing physical servers or data centres to virtual machines, private cloud or public cloud.
Operating system upgrades
Applications moved from unsupported Windows Server or Linux releases to current versions, with compatibility fixes.
Database version and platform migration
Databases upgraded or moved between platforms with schema conversion and data validation.
Platform replacement
Applications moved off retired platforms, such as old application servers or reporting tools, onto supported equivalents.
Dependency discovery
Hidden connections such as scheduled jobs, file paths, certificates and hard-coded addresses identified before the move.
How we work
How we deliver legacy application migration
Inventory and dependencies
Application components, configuration, integrations and data volumes documented.
Target environment build
New environment prepared and hardened, with configuration captured as code where possible.
Trial migration
Full migration rehearsed in a test environment and timed to plan the real cutover.
Validation
Users and automated checks confirm functions, integrations and data after the trial.
Cutover and rollback readiness
Production migration performed in the maintenance window with rollback steps ready if validation fails.
Related capabilities
Related capabilities in Software & Product Engineering
Software Maintenance & Support
Ongoing support for business applications after launch, including bug fixes, security patches, dependency updates, minor enhancements, performance monitoring and user support under agreed service levels.
Custom Software Development
Software built around the way your organisation actually works, for processes that packaged products handle poorly, delivered in short increments with source code, documentation and intellectual property owned by you.
Enterprise Application Development
Large, business-critical applications for many users, departments and locations, engineered for role-based security, audit trails, high availability, integration with core systems and a long operational life.
SaaS Product Development
Building subscription software products for many customers, including multi-tenant architecture, self-service sign-up, subscription billing, usage analytics, admin tools and the release practices needed to improve the product weekly.
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Questions & answers
Questions about Legacy Application Migration
Cannot find what you need? Our team responds to technical and commercial questions within one business day.
Ask a questionMigration changes where and on what platform an application runs while keeping its code largely the same. Modernisation changes the code, frameworks or architecture itself. Projects sometimes combine both.
We reverse-engineer configuration and behaviour from servers, code and logs, and involve long-standing users to confirm how the application should behave after migration.
Many migrations complete within a weekend window of a few hours. Large databases can use replication to keep downtime short.
Each migration is quoted as a fixed-price project after an inventory and dependency assessment.
Next step
Discuss legacy application migration with Acmez
Share what you need to change, build, integrate or support. We will map the practical next step.