Your legacy system, modernized
without a big-bang rewrite.

Usually neither extreme. Full rewrites fail at famous rates because value ships at the end; endless refactoring never escapes the old architecture. Our audit scores each module on risk, change frequency and business value, and most systems land on a strangler-fig migration, rebuild the modules that matter on a modern stack, refactor what is sound, and retire what nobody uses.

The old system stays in production the entire time. A routing layer sends each user to either the legacy app or a rebuilt module, so cutovers happen one screen at a time, with a config-flag rollback if anything misbehaves. Across our last 14 production cutovers, planned downtime was zero hours.

It moves with the system, slice by slice. We untangle the legacy schema, migrate history into PostgreSQL with scripted, rehearsed migrations, and run reconciliation reports after every move so your team can verify record counts and totals match. Nothing is deleted until you sign off, and the legacy database is archived, not dropped.

The first rebuilt module is typically live in four to six weeks. A full migration of a ten-year-old business system usually runs six to twelve months of monthly releases, depending on module count and data complexity, but you are banking improvements from month two, not waiting for a distant launch day.

Over a two-to-three-year horizon, almost always. The legacy line item is not just hosting, it is emergency fixes, features you cannot ship, hires you cannot make for a dead stack, and the unpriced risk of an unpatched runtime holding your revenue. The audit puts real numbers on both columns so the decision is financial, not emotional.

This is the most common way engagements start, and the calendar matters. We pair with your developer while they are still around, recorded walkthroughs, decision logs, runbooks for every scheduled job and quirk. By the time they leave, their knowledge lives in documents and tests instead of in one head.

Small, reversible slices. Every module ships behind the routing layer with characterization tests proving old behavior, a rollback flag, and a reconciliation report, so the maximum blast radius of any step is one screen, not the business. You also see working software monthly, which means a stalled project is visible in weeks, never buried for a year.

TypeScript, Node.js, React and Next.js on PostgreSQL, containerized with Docker and deployed through GitHub Actions, deliberately mainstream, so you can hire for it anywhere. You own the repo, the infrastructure and the docs from day one; staying with us after cutover is optional, not structural.