Legacy Migration

Modernize the code you can't afford to rewrite

Syntic AI Engineers migrate frameworks, languages, and platforms at a pace humans can't match — preserving behavior, generating tests, and shipping reviewable PRs your team can trust.

10x
faster migrations vs. hand-rolled refactors
<3%
of migrated files require human rework
1 PR
per logical change — every diff is reviewable

Built for the migrations nobody wants to do

Reads the whole codebase

Cross-file dependency understanding so refactors don't break what they shouldn't touch.

Cross-language fluency

Java→Kotlin, Python 2→3, AngularJS→React, COBOL→Java — and many more.

Reviewable PRs

Small, themed PRs with rationale and tests, not one mega-diff humans can't review.

Behavior preservation

Auto-generated characterization tests verify legacy behavior survives the migration.

Plugs into your CI

Migrations run in your pipelines, in your runners, against your test matrix.

Stays inside your boundary

Self-hosted runner option for proprietary, regulated, or air-gapped code.

How teams put it to work

01

Framework upgrades

React 16→19, .NET Framework→.NET, Spring Boot 2→3, Django 2→5 — done in weeks, not quarters.

02

Language migrations

Move off COBOL, VB6, Perl, or AngularJS with characterization tests covering the original behavior.

03

Cloud re-platforming

Refactor monoliths into services, lift-and-shift to managed runtimes, swap data layers.

04

Dependency hygiene

Remove deprecated APIs and obsolete libraries across thousands of files in a single pass.

Capabilities

  • Self-hosted runner for proprietary code
  • SOC 2 Type II, ISO 27001
  • Customer code never used for training
  • Characterization test generation
  • Branch policies and required reviewers honored
  • Full audit trail of every change

Retire the migration that's been on the roadmap for years

Tell us the source and target. We'll scope a 60-day pilot on a representative slice.