Legacy Modernisation
Modernise without the big-bang rewrite risk.
30 days
Post-delivery support
6–18 months
Typical timeline
100%
IP ownership to you
The Problem
Why Most Software Projects Miss the Mark
The problem isn't the technology — it's misaligned expectations, hidden scope creep, and code that ships but can't be maintained.
How CodeAir Solves It
With Legacy Modernisation, we set expectations before we start. You get weekly demos, clear scope management, and code your team can own forever.
Vague project scopes that grow mid-build and blow past budget.
Offshore agencies that deliver working software but code your team can't maintain.
Missing tests and documentation that make every future change risky.
Lack of transparency during development — progress reports replace actual demos.
Our Approach
How We Deliver This Service
Audit
Map the legacy system, identify risk zones and dependencies.
Facade
Wrap legacy in an API layer to enable incremental replacement.
Replace
Build and validate each replacement module before cutover.
Ready to Get Started with Legacy Modernisation?
We scope within 48 hours. No commitment required for the initial consultation.
Capabilities
What's Included in Legacy Modernisation
Strangler-fig pattern — no big-bang rewrite
A core deliverable of our Legacy Modernisation service — engineered to production standards.
API facade over legacy system from day one
A core deliverable of our Legacy Modernisation service — engineered to production standards.
Module-by-module incremental replacement
A core deliverable of our Legacy Modernisation service — engineered to production standards.
Parallel-run testing at every phase
A core deliverable of our Legacy Modernisation service — engineered to production standards.
Full documentation of new architecture
A core deliverable of our Legacy Modernisation service — engineered to production standards.
Our Approach
How We Approach Legacy Modernisation
Legacy modernisation is the most dangerous engineering project most businesses face. The risk of a big-bang rewrite has killed companies. We use the strangler-fig pattern: wrap the legacy system in an API facade, then incrementally replace modules one by one, keeping the business running throughout. Each phase is validated before the next begins. The result is a modern architecture delivered without a single moment of downtime.
Engagement Details
Pricing & Timeline
Pricing Model
Milestone-based
Typical Timeline
6–18 months
Ideal For
Built For Teams Like Yours
Engagement Models
Three Engagement Models. One Delivery Standard.
Fixed-Scope Project
Best for: Defined deliverables
Clear scope, fixed timeline, fixed cost. Ideal when you know exactly what you need and want predictable delivery.
Sprint Retainer
Best for: Ongoing development
A monthly block of engineering capacity. You direct the roadmap, we ship the features. Scales up or down monthly.
Team Extension
Best for: Scaling your team
Senior engineers embedded in your team. You keep full roadmap control while we handle execution.
Why CodeAir
Why Choose CodeAir?
No Over-Engineering
We build what you need, not what looks impressive in a tech talk. Pragmatic decisions over trendy patterns.
Predictable Delivery
We scope before we start. If something changes mid-project, we tell you immediately — not at the deadline.
Codebase You Can Own
Clean, documented, tested code. Your internal team can take it over without a six-month onboarding.
Senior Engineers Only
No juniors learning on your budget. Every engineer who works on your project has production experience.
Direct Communication
No account managers or middlemen. You talk directly to the engineers building your product.
IP Fully Yours
Every line of code, every API key, every cloud resource — yours. We hand over everything at project close.
FAQ
Common Questions About Legacy Modernisation
For most Legacy Modernisation engagements, 6–18 months. We always scope the timeline before we start so you know exactly what to expect.
Milestone-based
A brief description of what you want to build, your rough timeline, and any technical constraints you know about. We'll gather the rest in the scoping call.
Yes. We integrate with Slack, Jira, Linear, GitHub — whatever your team already uses. We don't force our tooling on you.
We assess the impact on timeline and cost, communicate it clearly, and agree on the adjustment before proceeding. No surprise invoices.
Yes. Every project includes a 30-day support window. We also offer ongoing retainer arrangements for clients who want continued development.
You own 100% of the intellectual property from day one. All code, design assets, API configurations, and deployment setups are transferred directly to you.
We communicate transparently using Slack and daily logs, host weekly progress demos, and give you direct access to development branches.
Yes. You can scale the dedicated resource block up or down with a standard 14-day notice as your development roadmap priorities shift.
We sign mutual NDAs before technical scoping starts. Our engineering environments follow strict security controls (GDPR/SOC 2 and secure IAM variables).
Interested in Legacy Modernisation?
Tell us about your project and we'll send a scoped estimate within 24 hours. Honest scope, honest cost, no sales pressure.