Legacy Modernisation ServiceOld, brittle software rebuilt on a stack that supports your growth
Legacy systems don't have to be replaced overnight. We incrementally modernize aging codebases — migrating from outdated frameworks, improving architecture, and rebuilding critical paths while keeping your business running.
Legacy software is expensive to maintain, difficult to hire for, and increasingly risky from a security perspective. But rip-and-replace projects are expensive and dangerous. We take an incremental approach — modernizing the most painful parts first while keeping your business running. The goal is to reach a modern, maintainable codebase without a 12-month rewrite project.
Codebase audit
Thorough assessment of technical debt, security vulnerabilities, and modernization opportunities.
Incremental migration
Strangler fig pattern — new features in modern code while legacy systems continue running.
Data migration
Schema migrations, data transformation, and validation ensuring zero data loss during transitions.
Security hardening
Patch vulnerabilities, update dependencies, and implement modern authentication and encryption.
Who this is for
Business owners & product teams
You need software delivered — not just advice. We handle the full build from scoping through to launch, communicating in plain language throughout. No jargon, no handoff gaps, no surprise scope creep.
Not the right fit?
We're a focused agency — we take on projects where we can genuinely add value. If your project isn't a match, we'll say so early and point you in the right direction.
Challenges we solve
Nobody understands the existing code
The original developers left, documentation is sparse, and the codebase has grown organically over years. Understanding what exists is the hardest part.
Business can't stop while you rebuild
Users still need the system daily. Modernization has to happen incrementally without disrupting operations.
Best practices
Audit before you plan
Spend 1–2 weeks understanding the existing system before committing to an approach. Many modernization projects fail because they underestimate existing complexity.
Use the strangler fig pattern
Build new features on modern technology and gradually route traffic away from legacy systems — no big bang cutover.
Write characterization tests before touching legacy code
Capture the existing system's behavior with tests before refactoring. These tests become your safety net when the original logic isn't documented.
Prioritize security fixes in the first sprint
Legacy systems often have critical CVEs in outdated dependencies. Patch security vulnerabilities before addressing architecture — risk reduction is always highest priority.
Useful resources
Pricing guide
Codebase audit from $5,000–10,000. Full modernization projects from $20,000–100,000+ depending on system complexity. Incremental approach means you see ROI from the first sprint.
All projects start with a free 30-minute call to scope your requirements. We provide fixed-price quotes — no hourly billing surprises.
Frequently asked questions
Related technologies
Ready to get started with Legacy Modernisation?
Tell us about your business goals. We'll scope your Legacy Modernisation project and provide a free quote within 24 hours.
We limit intake each month so every project gets the focus it deserves.