Legacy System Modernisation

What this solution is

A business-critical application is holding you back — every release is risky, scaling means scaling everything, and nobody wants to touch it. But a full rewrite is expensive and dangerous. Legacy System Modernisation gives you a third option: reduce the risk, clarify the architecture, and move toward a maintainable cloud model in phases, while customers keep being served.

For most SMB and SaaS teams, the first step isn't microservices. It's stabilising what you have, documenting dependencies, improving deployment, and building a migration path that protects day-to-day operations.

When you need this

This solution fits when:

• A business-critical app runs on ageing or manually managed infrastructure
• Releases are risky because the app and environment are tightly coupled
• Backups, monitoring, and recovery steps are unclear or untested
• Scaling one workload means scaling the whole system
• You want cloud benefits but can't pause delivery for a rewrite
• Leadership needs a practical migration roadmap before funding the work

What we do

• Assess the current application, runtime, infrastructure, data stores, integrations, and risks
• Map dependencies and identify migration constraints
• Design a phased modernisation roadmap
• Separate web, worker, scheduled, storage, and database responsibilities where practical
• Recommend AWS architecture, CI/CD, observability, and recovery improvements
• Plan phases that reduce risk before any larger refactoring

Deliverables

• Legacy system assessment report
• Dependency and risk map
• Before-and-after target architecture
• Phased cloud migration and modernisation roadmap
• Deployment, rollback, backup, and monitoring recommendations
• Optional implementation sprint plan for the first stabilisation phase

Duration

Discovery and roadmap work typically takes 4 to 6 weeks. Implementation timing depends on application complexity, integration count, data size, and acceptable downtime windows.

What you walk away with

• A clear path from legacy infrastructure toward a safer cloud architecture
• Risk assessment before any major application rewrite
• A real understanding of dependencies, release constraints, and recovery needs
• A prioritised roadmap for migration, CI/CD, observability, and future modularisation

Related services

Related reading

• DevOps for SaaS platforms: designing infrastructure that doesn't break at scale
• Signs your infrastructure isn't ready for growth