Legacy Application Modernization.
Old monoliths → clean, cloud-native services.
Modernise a legacy system without a big-bang cutover, without downtime, and without losing the business logic that's in nobody's head anymore.
What it is
The riskiest legacy code is the one everyone's afraid to touch. We start there.
Legacy Application Modernization is the careful work of moving a system that's working (mostly) onto something maintainable — without breaking the parts of it that nobody remembers writing.
We start with an audit: what runs, what it does, what depends on it, and what the risk map looks like. Then we modernise incrementally — strangler pattern, shadow deploys, parity tests — never a big-bang.
The finished system serves your users identically or better, on infrastructure your team wants to be on-call for.
What you get
6 concrete things, on the SOW.
Every deliverable is written into the statement of work — priced, dated, and signed off by a named engineer at the relevant gate.
- 01Full system audit & risk register
- 02Strangler-pattern migration plan
- 03New services deployed alongside legacy
- 04Parity test suite (behaviour-verified)
- 05Progressive cutover with rollback
- 06Legacy decommission plan & timeline
Where this shows up
Three shapes of engagement.
Different problems, same method. These are the concrete work shapes we typically deliver under Legacy Application Modernization.
Monolith to services
Break out the highest-risk service first, deploy in shadow, cut over when parity holds.
On-prem to cloud
Lift-and-optimise (not lift-and-shift) — with data migration parity-verified.
Framework upgrade
Move off an unsupported framework version without freezing feature work.
The stack
Capabilities, not vendors.
The requirement picks the tool, not the other way round. Naming vendors up front would set the wrong ceiling on what we take on.
- Strangler pattern
- Shadow deploys
- Parity testing
- Data migration
- Feature flags
- Progressive rollout
How it runs
Seven stages. One signature at a time.
Every Legacy Application Modernization engagement runs through the same seven-gate Aivora Delivery Engine — each stage run by specialised agents, each ending at a gate a senior engineer must sign.
Frequently asked
Questions people ask before booking.
How do you avoid breaking things nobody documented?
The parity test suite. Every migrated behaviour runs against the legacy and the new system in shadow, and the diff has to be zero (or explained) before cutover.
Can you work on our system while features are still shipping?
Yes — that's the point of the strangler pattern. Feature work continues on the legacy; we add the new system alongside and cut over service-by-service.
What if the legacy has no tests?
We characterise it with behavioural tests before we touch it. That characterisation is the first deliverable, whether we continue with the modernisation or not.
Ready when you are
Bring us the hard bit.
Ninety-minute kickoff. Five-day audit. Fixed quote for Legacy Application Modernization — in writing, before we build.