Case Study · Modernisation
Modernising a hotel property management system from AngularJS and Delphi to Angular 21 and .NET 10
An international enterprise software provider runs a property management system that hotels depend on every day for reservations, rooms, guests, housekeeping and payments. AMT is its modernisation partner, moving the PMS from AngularJS to Angular 21 and from Delphi to .NET 10 in planned phases, while keeping every existing feature working.
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At a glance
- Client
- International enterprise software provider with a hospitality product line
- Industry
- Travel and transportation, hospitality
- Application
- Enterprise hotel Property Management System (PMS)
- Front end
- AngularJS → Angular 21
- Back end
- Delphi → .NET 10
- Database
- Elevate → modernised data layer → PostgreSQL (planned)
- Approach
- Six-phase modernisation with functional parity at every step
- Status
- In progress
The short version
Hotels cannot pause their PMS for a rewrite. AMT is modernising this one layer by layer: front end first, then back end, then feature parity, then the database, then retiring the old Delphi server components and moving to PostgreSQL. Each phase keeps the system working and gets validated before the next begins. Usability improvements are proposed along the way and only built once the client approves them.
The problem
- Legacy stack. AngularJS reached end of life on 31 December 2021, and the Delphi back end needed replacing for long-term maintainability.
- Interconnected features. Reservations, rooms, guests, housekeeping, financials, payments, reporting and property admin all depend on each other.
- Business continuity. Hotels run on the PMS every day, so changes must be controlled.
- Dependencies. Front end, back end and database had to move in a careful sequence.
- User experience. Existing workflows had room for improvement.
- Sustainability. The product needed a foundation that makes future work simpler.
The modernisation roadmap
| Phase | Activity |
|---|---|
| 1 | AngularJS to Angular 21 front-end upgrade |
| 2 | Delphi to .NET 10 back-end migration |
| 3 | Angular modernisation and feature parity |
| 4 | Elevate database migration and .NET application optimisation |
| 5 | Delphi server retirement, timeline to be decided |
| 6 | PostgreSQL migration after the desktop application is retired |
What AMT is doing in each layer
Front end: AngularJS to Angular 21
- Migrating the AngularJS front end to Angular 21
- Modernising components and front-end architecture
- Keeping compatibility with existing PMS workflows
Back end: Delphi to .NET 10
- Moving Delphi back-end functionality to .NET 10
- Modernising services and business logic
- Preserving critical integrations and existing behaviour
Feature parity and UX
- Reaching functional parity across the new Angular components
- Reviewing user journeys and recommending usability improvements
- Building only the improvements the client approves
Database and legacy retirement
- Migrating from the Elevate database to a modernised architecture
- Optimising the .NET application as database dependencies move
- Retiring Delphi server components progressively
- Moving to PostgreSQL once the desktop application is retired
AMT's responsibilities
| Area | What AMT does |
|---|---|
| Architecture and planning | Migration strategy, technology assessment, dependency analysis, phase planning |
| Front end | AngularJS to Angular migration, component modernisation, integration |
| Back end | Delphi to .NET migration, business logic, optimisation |
| Database | Migration planning, compatibility, data-layer optimisation |
| UI/UX | Identifying, designing and building approved improvements |
| Quality | Functional validation, regression testing, feature parity checks |
| Ongoing | Enhancements, defect fixes, support through the transition |
Expected outcomes
The programme is running in phases. The outcomes it is designed to deliver:
- A modern foundation on Angular 21, .NET 10 and a modern database
- All existing PMS functionality kept throughout
- Less dependence on legacy frameworks, so maintenance gets easier
- Better usability through approved improvements
- Lower migration risk, because each phase is validated before the next
- A base for future performance work and features
Technology stack
| Layer | From | To |
|---|---|---|
| Front end | AngularJS | Angular 21 |
| Back end | Delphi | .NET 10 |
| Database | Elevate | Modernised data layer, then PostgreSQL (planned) |
Before you plan a migration like this
- Which layer moves first? Here the front end went first. Pick the layer that unblocks the others and carries the least business risk.
- How do you prove parity? Regression tests on real workflows, run before and after every phase, are the only honest answer.
- When do you improve the UX? Do it alongside the migration, but only with sign-off, so parity and change are never confused.
- What do you retire, and when? Old server and desktop components often hold up the database move. Put their retirement on the roadmap even if the date is open.
FAQ
How do you migrate from AngularJS to Angular?
In stages. Migrate the front end to the current Angular version while keeping existing workflows compatible, then modernise components and verify feature parity with regression testing.
Can Delphi applications be migrated to .NET?
Yes. In this programme Delphi back-end functionality is being moved to .NET 10, with business logic modernised and existing integrations and behaviour preserved.
Why not rewrite the whole system at once?
Hotels use the PMS every day. A phased approach lets each layer be validated before the next moves, which keeps the business running and lowers risk.
When does the database move to PostgreSQL?
After the Elevate migration and once the desktop application is retired. It is the last phase on the roadmap.