Legacy migration
For engineering teams moving a legacy system to a modern platform, and deciding which of its rules come along.
- Stories
Billing migration went live. Which customer settings got lost?
Abundance Energy, a Texas electricity provider, moved every account to a new billing system and then listed six problems on a public status page, from autopay shown as on when it was off to balances that did not transfer. A before-and-after of one setting, and what to check before you cut over.
- Research
Payroll went live and people are underpaid. Where do you look?
Sydney Water replaced its payroll system in July 2026. By late September three unions were taking industrial action over pay that arrived late, short or not at all. The question every migration team should ask before go-live is which rules the old system was applying.
- Research
Will AI modernize your legacy system, or just rewrite it?
AI can translate a legacy application into a modern language in days. Whether the new system still does what the business needs depends on reasons that were never written into the code.