Code and rule archaeology
Automated analysis of COBOL, PL/SQL, VB and legacy Java to surface business rules, dead code and hidden dependencies.
All services
Data & Platform
Legacy Modernisation
Understand the system before you agree to replace it.
- Weeks
- To a documented behaviour map
- Slice by slice
- Migration with rollback
- Equivalence
- Tested against production traffic
The problem we solve
The risk in legacy modernisation is undocumented behaviour. We use AI-assisted analysis to recover the rules a system actually enforces, then migrate in slices with equivalence testing at every step.
What the work includes
Behaviour documentation
Readable specifications and data-flow maps reviewed by the people who still know the system.
Test generation
Characterisation tests captured from production behaviour so the new system can be proven equivalent.
Incremental migration
Strangler-pattern delivery with routing, dual-run and rollback at every slice.
How the engagement runs
A sequence you can plan a quarter around.
- 01
Understand
Automated code analysis, dependency mapping and expert review sessions.
- 02
Prove
First slice migrated, dual-run and compared against the legacy output.
- 03
Migrate
Sequenced slices with equivalence gates and progressive decommissioning.
Common questions
Before you commit.
- Does AI rewrite the code unsupervised?
- No. It accelerates understanding and test generation; engineers own every change that ships.
- Can we stop midway?
- Yes — the slice approach means every increment is independently valuable and safely reversible.
Related practices
Data Foundations
Pipelines, lineage, quality gates and feature stores so every model runs on data you can defend in an audit.
ViewMLOps & AI Platform
CI/CD for models, observability, drift detection, rollback discipline and a self-service platform for your teams.
ViewCloud & Inference Infrastructure
GPU capacity planning, private model hosting, edge inference and FinOps for AI workloads.
ViewTalk through legacy modernisation.
A 45-minute briefing with the people who would run the work — scope, timeline and a straight answer on whether it is the right next step.