Legacy System Migration
Moving data and behaviour off ageing platforms with verification at every step.
Migration risk is almost always data risk. The application can be rebuilt; the twenty years of records behind it cannot, and the quiet corruption of a subset of them may not be noticed for months.
We move data and behaviour off ageing platforms with verification at every step — profiling before, reconciliation during, and a tested rollback until the day you decide you no longer need it.
How we approach it
We profile the source data first. Every migration surfaces records that violate rules the old system never enforced, and it is much cheaper to decide what to do about them before cutover than during it.
Why this matters
-
Verified, not assumed
Row counts, checksums and business-rule reconciliation on every run.
-
Rehearsed cutover
The full migration run against production-scale data before the real one.
-
A way back
A tested rollback path retained until you formally sign off.
-
History preserved
Archival and retention handled so audit and legal obligations still hold.
What is included
-
Data profiling
Quality, duplication and rule violations quantified before design.
-
Mapping and transformation
Documented field-level mapping with the transformation rules agreed in writing.
-
Reconciliation reporting
Automated comparison of source and target after every run.
-
Cutover planning
A timed runbook with go/no-go criteria and named decision owners.
How we deliver it
-
01
Discover
Workshops with the people who will use it, a map of the systems the migration has to fit alongside, and written agreement on what success looks like.
-
02
Design
Architecture, data model and interface prototypes, reviewed with your team before any production code is written.
-
03
Build
Two-week increments with a demo environment you can use throughout, so the roadmap stays open to change.
-
04
Harden
Load testing, security review, accessibility audit and the operational tooling needed to go live safely.
-
05
Operate
Support, iteration and a documented handover whenever you decide to run it in-house.
What you receive
- Data profiling report and remediation decisions
- Documented field-level mapping specification
- Repeatable migration tooling
- Reconciliation reports for each rehearsal and the live run
- Cutover runbook and rollback plan
Tell us about your idea, and we'll make it happen.
Have a problem that needs solving? We would like to hear about it.