Services · Engineering

    Legacy application modernization services, without stopping the business

    Application modernization means moving software that still runs the business onto technology that can be maintained, secured and extended. AMT modernises live systems in phases: AngularJS to Angular, Delphi to .NET, .NET Framework to modern .NET, and full platform migrations. Every phase keeps existing features working and is validated before the next one starts.

    Schedule Technical Discovery

    Your first conversation will be with a senior technical partner, not a salesperson.

    Why modernise now

    Three signs it can no longer wait:

    Support dates for the stacks we work with are on Technologies.

    Six ways to modernise, and when each is right

    Modernisation is not one thing. Pick the route per system, not per estate.

    Six ways to modernise, and when each is right
    RouteWhat it meansRight whenWatch out for
    RetainLeave it as it is, for nowIt works, is supported and rarely changesSupport end dates
    RehostMove it to new infrastructure unchangedThe problem is the servers, not the codeMoving old problems to a new place
    ReplatformUpgrade the runtime or framework, keep the designA supported version exists and the design is soundHidden breaking changes
    RefactorRestructure code without changing behaviourThe code is hard to change but the logic is rightScope creep into a rewrite
    Rebuild in phasesRewrite layer by layer while the old system runsThe stack is obsolete and the business cannot stopRunning two systems side by side for a while
    ReplaceMove to a product you buyA product now does what you builtMigrating data and habits

    AMT's honest default: replatform when you can, rebuild in phases when you must, and only rewrite everything at once if the system is small.

    Migrations we do

    Migrations we do
    FromToProof
    AngularJSAngular (current versions, including Angular 21)Hospitality PMS modernisation
    Delphi.NET 10Hospitality PMS modernisation
    .NET FrameworkModern .NETOur .NET developers do this work daily
    COBOL.NET, with AI-assisted analysisOur article on AI-assisted COBOL to .NET
    Legacy commerce stackMultilingual B2B e-commerce and ERP platformB2B e-commerce and ERP phased migration
    Legacy databasesPostgreSQL and modern data layersHospitality PMS modernisation

    How AMT modernises a live system

    1. Inventory. What the system does, who uses it, what it connects to, and which features nobody uses any more.
    2. Pick the route per component. Using the six routes above.
    3. Plan the phases. Usually front end, back end, data, then retirement of old components. The order depends on dependencies and business risk.
    4. Prove parity. Regression tests on real workflows, run before and after every phase.
    5. Move one phase at a time. Each phase is validated before the next starts.
    6. Retire the old pieces. Old servers, desktop apps and databases are switched off on a plan, not left running forever.

    Patterns for doing this without downtime are on Modernise without downtime.

    Proof

    Hospitality PMS, in progress. An international enterprise software provider's hotel property management system is moving from AngularJS to Angular 21 and from Delphi to .NET 10 in six phases, with feature parity at each step and a planned move to PostgreSQL.

    Global B2B marketplace, completed. A wellness marketplace with warehouses in Germany, Singapore and New Zealand moved to a new e-commerce and ERP platform in phases over about six months, while it kept trading. Fulfilment time fell 28% and retention rose 34%.

    What drives modernisation cost

    We quote after discovery.

    What drives modernisation cost
    DriverLower effortHigher effort
    Size and ageSmall, documentedLarge, undocumented, many authors
    RouteReplatformRebuild in phases
    IntegrationsFewMany, including old protocols
    DataClean, one databaseSeveral databases, data quality issues
    Downtime allowedA weekendNone

    FAQ

    What is application modernization?

    Moving an existing application onto current, supported technology so it can be maintained, secured and extended, by upgrading, restructuring, rebuilding or replacing parts of it.

    How do you modernize a legacy application?

    Inventory what it does, pick a route for each component, plan the phases, prove feature parity with regression tests, move one phase at a time, then retire the old components.

    Can you modernise a system without downtime?

    Usually, yes, by migrating in phases while the old system keeps running. A global B2B marketplace moved to a new platform this way over about six months without stopping trade.

    How do you migrate AngularJS to Angular?

    In stages: move the front end to current Angular, keep existing workflows compatible, modernise components, and verify feature parity with regression tests. AMT is doing this for a hotel property management system right now.

    Can Delphi applications be migrated to .NET?

    Yes. AMT is migrating a Delphi back end to .NET 10 for an enterprise hospitality system, preserving integrations and existing behaviour.

    When does .NET 8 support end?

    On 10 November 2026, the same day as .NET 9. .NET 10 is supported to 14 November 2028.

    How long does modernisation take?

    It depends on size and route. Expect a discovery sprint of two to three weeks first, which produces the phase plan and an estimate range.

    Tell us what the system runs on, what it does for the business, and what cannot break.

    See five safe phasing patterns →