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Software Modernization

Old software. New life.

A corporate system stuck on PHP 5.x, an end-of-life .NET Framework, an unusable Delphi app, legacy code "only one developer understands" — strangler-fig pattern, phased migration, parallel run. We modernise without breaking, without downtime, without taking risk.

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Modernisation progress

Legacy New
30% legacy70% modernized
Orders migrated
Customers migrated
Inventory migrated
Reporting in flight
Legacy admin queued

Familiar symptoms

Does your current system make you say any of these?

"

Adding this feature takes months.

"

There was one developer who knew it; they left.

"

Migrating to a new server / cloud is impossible.

"

Performance keeps degrading.

"

No security patches; vendor support has ended.

"

It doesn't fit the mobile era.

"

No documentation, no clear authorship.

"

Our vendor effectively holds us hostage.

Our approach

We weave the new system around the old one — without stopping it.

Never a big-bang ("rewrite everything overnight"). Instead the strangler-fig pattern: new features in the new architecture; old features migrated step by step. Production keeps running at every stage; rollback is always safe.

  1. 01

    Bounded change

    New features are written only in the new stack.

  2. 02

    Request routing

    A reverse-proxy routes requests between new and old.

  3. 03

    Data bridge

    Two-way sync between the old DB and the new DB.

  4. 04

    Module-by-module migration

    Pieces of the old system migrate one at a time.

  5. 05

    Parallel verification

    Are the old and new returning the same answers to the same request?

  6. 06

    Decommission

    Once all modules have moved, the old system is retired.

What we modernise

Is yours on this list?

PHP 5.x
→
Laravel 11 / PHP 8.3
.NET Framework 4.x
→
.NET 8
Delphi / VB6
→
Modern Web + .NET / Laravel
Classic ASP
→
.NET Core / Laravel
jQuery + Bootstrap 3
→
React / Vue + Tailwind
Monolithic Java EE
→
Spring Boot + microservices
Oracle Forms
→
Web app + REST API
On-prem Windows Server
→
AWS / GCP / Azure
SOAP-only services
→
REST + GraphQL
MySQL 5.5
→
MySQL 8 / PostgreSQL 16
Manual deploy + FTP
→
CI/CD + containers
Tek sunucu / no backup
→
Multi-region + DR

Target stack

Modern, proven, sustainable.

PHP 8.3 Laravel 11 .NET 8 Node.js 22 TypeScript React / Vue PostgreSQL 16 MySQL 8 Redis Stack Docker Kubernetes CI/CD (GitHub / GitLab) Sentry + Datadog CDN + edge OWASP-aligned OpenAPI / Swagger

Risk management

Modernisation has to be safe.

01

Parallel run

Old and new live at the same time; traffic shifts gradually to the new.

02

Feature flags

Every new feature lives behind a flag; turned off instantly on issue.

03

Live data verification

Production traffic goes to old + new; answers are compared.

04

Rollback guarantee

At every stage, one-click return to the old system.

05

Hourly backups

During migration, hourly encrypted backups in a separate region.

06

Interim staffing

A working protocol with people who know the old system.

Process

From audit to decommission.

  1. 01

    Audit

    Map of the old system, risks, module list.

  2. 02

    Roadmap

    Which module first, the parallel-run plan.

  3. 03

    Strangler setup

    Reverse proxy, data bridge, feature-flag stack.

  4. 04

    Module-by-module migration

    New modules in the new architecture in sequence.

  5. 05

    Parallel verification

    Side-by-side compare under production traffic + sign-off.

  6. 06

    Decommission

    Old system shut down, source handed over.

Stories

Systems we modernised.

Finance 40+ modules

PHP 5.6 ERP → Laravel 11

18 months parallel-run, zero downtime.

Manufacturing 2 plants

Delphi tracking → Web + .NET 8

A 30-year-old Delphi system moved to the modern web.

Dealer 600+ dealers

Classic ASP dealer portal → Laravel

600+ dealers unaffected, replaced piece by piece.

Logistics Multi-AZ

On-prem .NET → AWS multi-AZ

Cloud migration + auto-scale.

Health 8 services

Java EE → Spring Boot microservices

Modular architecture, GDPR-aligned.

Education EN/TR/DE

Legacy portal → React + Laravel API

Mobile-first, multilingual.

FAQ

Most asked

Possible, but risky. Big-bang rewrites have a high failure rate. We recommend phased modernisation; production never stops, rollback is always safe.
No. In the early phase we work alongside them for knowledge transfer. During modernisation they keep the old system; we build the new one.
Depending on size, 4-18 months. First modules go live on the new architecture in 6-10 weeks; the full system is ready in roughly 9-12 months.
Zero. Parallel run + hourly backups + data bridge. Old and new hold the same data; if the new errs, the old is still the source of truth.
Yes. All new code, documentation and DB schema are contractually transferred to your ownership. No vendor lock-in.

Build the new system together — without stopping the old one.

In a 30-minute call we review your current system together; audit report in 2 weeks.

Book a call Contact us
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