B Y T E   S T R E A M

Byte Stream Software

Legacy System Modernisation

Legacy System Modernisation

Outdated legacy systems are one of the most significant drags on business agility, security, and cost efficiency. We help businesses safely and systematically modernise legacy applications — reducing technical debt, improving maintainability, and unlocking the ability to innovate — while protecting existing business logic and data.

Legacy Assessment & Modernisation Strategy

We perform a comprehensive assessment of your legacy landscape — cataloguing dependencies, data flows, integrations, and business rules — then develop a prioritised, risk-managed modernisation strategy with clear phases and milestones.

Re-Architecture & Refactoring

We systematically break down monolithic legacy applications into maintainable, independently deployable components or microservices — improving scalability, resilience, and the ability to update capabilities independently.

Data Migration

Our data engineers specialise in safe, validated data migrations — transforming legacy data structures into clean, well-modelled schemas that power modern applications reliably without data loss or corruption.

Phased Delivery with Zero Downtime

We use proven techniques such as the Strangler Fig pattern, feature flags, and blue-green deployments to deliver modernisation incrementally — ensuring business continuity with no disruptive big-bang cutovers.

Key Benefits

  • Reduced technical debt & maintenance cost
  • Improved system performance & reliability
  • Better security & compliance posture
  • Faster feature delivery post-modernisation
  • Cloud-ready, scalable architecture
  • Zero-downtime migration approach
Strangler Fig PatternMicroservicesETL / Data MigrationContainerisationEvent-Driven ArchitectureAPI-First

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