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Legacy Node.js

Callback-hell Node.js apps, CommonJS monoliths, old Express.

How Renovio modernizes Legacy Node.js

Old Node.js (pre async/await) is typically monolithic and hard to maintain. AI restructures it into modern TypeScript with async/await and a clear architecture.

Typical signals you are in this bucket

  • Node 6/8/10
  • CommonJS, callback patterns
  • Express 3 or 4
  • No TypeScript

Recommended target stack

Node 22 + TypeScript + Hono or NestJS.

What you receive

For €490 you receive a written report covering the analysis of your Legacy Node.js codebase, a risk assessment, a phased rewrite plan, and a full project cost estimate. The report contains enough detail for your own team, your existing vendor, or Renovio to execute.

Want to know what re-writing your system would cost?

For €490 you get a clear, written assessment. No vague ranges, no sales theatre. Re-factor, re-write, re-launch — on a fixed budget.

Order an evaluation →