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CodeByDesign

Custom Software

Application Modernization

Modernise legacy systems incrementally, reducing risk while unlocking cloud, data and AI capabilities.

The challenge

Legacy platforms often hold the most valuable data and processes, yet they are expensive to change and difficult to connect to modern AI. A big-bang rewrite is rarely the right answer.

Capabilities

What we deliver

Assessment and planning

Codebase, architecture and dependency analysis to define a realistic migration path.

Incremental migration

Strangler-fig patterns that replace components gradually while the business keeps running.

AI-assisted code transformation

AI tooling to accelerate code comprehension, documentation, test generation and refactoring.

Data migration

Validated migration of historical data with reconciliation and rollback plans.

Typical deliverables

  • Modernisation assessment and roadmap
  • Migrated services and APIs
  • Regression test coverage
  • Cut-over and rollback plan

Technologies we use

  • .NET
  • Java
  • Node.js
  • Kubernetes
  • PostgreSQL
  • Kafka

Relevant industries

Application Modernization: common questions

How do you avoid disrupting day-to-day operations?

We migrate in small, reversible steps with parallel running and reconciliation where risk is high.

Talk to us about Application Modernization

Share your goals and constraints. We'll reply within one business day with practical next steps.