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Legacy application support & modernisation

Take over, support and fix old or undocumented software left by a previous team, then move it to a modern stack step by step, without stopping work.

What this solves

Many businesses run on software that works but has become hard to touch: the original developer left, there is no documentation, updates are skipped because something might break, and every small change takes weeks. Meanwhile the risks grow: outdated libraries with known security holes, servers nobody maintains, pages and reports that get slower every year.

How it is built

  1. Review before promises. The code, database, hosting and integrations are reviewed, and you get a written map of risks and quick wins in plain language.
  2. Stabilise. Backups, monitoring and error alerts come first, then the most painful bugs and the riskiest outdated dependencies.
  3. Document along the way. How the system works, how to deploy it and where the business rules live. The knowledge stops living in one person’s head.
  4. Modernise step by step. The parts that change most often or cause most problems are moved to a modern stack first, while the rest keeps running. Each step ships on its own.
  5. Support or hand over. Ongoing support, or a clean handover to your own team with documentation and access.

Typical results

  • A system that is backed up, monitored and documented
  • Changes that take days instead of weeks
  • Faster pages and reports after performance work
  • A move to modern technology in small, reversible steps

Questions

Q01Our system was built years ago and nobody understands it. Can you still work with it?

Yes. Work starts with a short review of the code, database and hosting. You get a plain-language report of what is there, what is risky and what to fix first, before any larger commitment.

Q02Should we rewrite the application from scratch?

Rarely all at once. A full rewrite stops improvements for months and often loses business rules nobody wrote down. In most cases the system is stabilised first, then replaced piece by piece while it keeps working. A rewrite is recommended only when the review shows it is cheaper.

Q03Will our team have to stop using the system during the migration?

No. Old and new parts run side by side, data is migrated in tested steps, and each switch-over has a way back.

Q04Can you just support the application without changing it?

Yes. Support can mean fixing bugs, keeping dependencies and servers updated, watching for errors and making small changes when the business needs them.

Q05Who owns the code and the documentation?

You do. Everything stays in your repository and infrastructure, including the documentation written during the takeover.

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Next step

Need a developer for your project?

Describe the task in a few lines and attach any files, whether you need help inside your team or a whole project built. If it’s easier to talk, book a 30-minute call.