Official Codemod Certified Partner

Code transformation
at scale.

We automate code migrations and refactoring so your
team can focus on building the future.

Caldorin

One thing, done
extremely well.

Framework Migrations

Safely migrate between frameworks and major versions — React class→hooks, Vue 2→3, Angular upgrades, Next.js app router — across your entire codebase.

ReactVueAngularNext.js
Automated Refactoring

Large-scale, AST-based transformations that preserve behavior while modernizing patterns and APIs across millions of lines.

Legacy Modernization

Transform legacy codebases into modern, maintainable systems. We handle the complexity so your team ships features.

Dependency Upgrades

Automate breaking-change upgrades across your entire dependency tree.

Code Maintenance

Ongoing code health management so technical debt never becomes a crisis.

Custom Codemods

Bespoke, reusable, and publishable transformation scripts for your specific needs.

See the difference.

Before
class UserProfile extends React.Component {
  constructor(props) {
    super(props);
    this.state = { user: null, loading: true };
  }

  componentDidMount() {
    fetchUser(this.props.id)
      .then(user =>
        this.setState({ user, loading: false })
      );
  }

  render() {
    if (this.state.loading) return <Spinner />;
    return <div>{this.state.user.name}</div>;
  }
}
After
const UserProfile = ({ id }) => {
  const [user, setUser] = useState(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    fetchUser(id).then(user => {
      setUser(user);
      setLoading(false);
    });
  }, [id]);

  if (loading) return <Spinner />;
  return <div>{user.name}</div>;
};

How we work.

01

Discovery & Audit

We analyze your codebase, map dependencies, identify targets, and deliver a comprehensive migration plan with effort estimates.

02

Codemod Engineering

Our engineers build custom, AST-based codemods using the Codemod platform — deterministic, tested, and safe.

03

Staged Execution

We run transformations incrementally, validating each stage against your test suite and CI pipeline before moving forward.

04

Verification & Handoff

Full regression testing, documentation, and knowledge transfer. Your team gets a clean, modern codebase — with confidence.

Precision at scale.

10×
Faster than manual refactoring
99.7%
Transformation accuracy
1M+
Lines of code transformed
0
Migration-caused incidents

Why Caldorin.

Hyper-specialized

We only do code migration and maintenance. This singular focus means deeper expertise and superior results on every engagement.

Automation-first

We don't manually rewrite code. We build deterministic, AST-based codemods that transform thousands of files — no human error.

Behavior-preserving

Every transformation is validated against your test suite. We guarantee functional equivalence — code changes form, not behavior.

Scales infinitely

Whether it's 100 files or 100,000 — codemods apply the same transformation consistently. Scale decreases cost, not quality.

Partner-friendly

We work alongside your existing SIs, agencies, and internal teams. We augment, never replace.

Reusable output

Every codemod we build is reusable and publishable. Your investment compounds across future migrations.

Who we work with.

PE-backed SaaS roll-ups

Consolidating multiple acquired codebases? We standardize and modernize tech stacks across portfolio companies at speed.

Non-tech enterprises

Large organizations with critical legacy systems that need modernization without disrupting ongoing business operations.

Systems integrators & agencies

We partner with SIs and agencies to handle migration complexity, so you can focus on architecture and delivery.

Ready to modernize
your codebase?

Free assessment. Clear roadmap. No strings attached.

Schedule a consultation