Legacy code and inherited applications

Your old code comes back to life, under control.

A supplier left, the documentation is gone, nobody dares touch the core of the software. LuxGap reads all the code, on the branches you deploy, ranks the risks, fixes them with the LuxApps developers, then hosts and monitors the application so that it never becomes a black box again.

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Every language, from COBOL to TypeScriptRead-only, nothing to installTaken over by LuxApps developersEvidence for the auditor and the regulator

The upgrade

From red to green, file by file

Each square is a file of your application. The analysis starts with an honest map, prioritised fixes turn it green, and continuous monitoring prevents any slide back.

critical
to fix
compliant

Observed on code taken over by LuxGap10 to 20%

Required from LuxGap developers90 to 100%

Inventory
Risk map
Prioritised fixes
Modernisation
Continuous monitoring

What you keep, what we take over

You keep

Your software, your forge, your intellectual propertyYour teams and your suppliers, if you wishThe decision on every fix and every priority

LuxGap takes over

Reading the whole code base and mapping the risksThe fixes, by LuxApps developers, when you decideGradual modernisation, without rewriting everythingHosting, backups and 24/7 monitoringCompliance evidence, kept up to date

What we find

What code that nobody reads any more reveals

Hard-coded keys and passwords

Secrets forgotten in start-up or configuration files, sometimes for years.

Hand-built queries

Sorting and filters assembled as text: the classic door to SQL injection.

Tenant isolation switched off

A filter between customers commented out during a fix and never restored: everyone can then read everyone else’s data.

Frozen dependencies

Libraries never updated, with vulnerabilities published long ago.

Diverging branches

A production branch months behind: the analysis covers the branches you deploy, not only the main one.

No tests

The test robot replays the existing business journeys and lays a safety net before the first fix.

The method

Five steps, without rewriting everything

InventoryLanguages, dependencies, branches, databases: everything is counted and listed.
Risk mapEvery finding is ranked by severity and real exposure, with its recommended fix.
Prioritised fixesCritical flaws first. Your teams, your supplier or the LuxApps developers fix them.
ModernisationUpdates, rework of fragile areas, added tests: the software becomes maintainable again.
Continuous monitoringEvery new commit is reviewed, and the application is hosted, backed up and monitored 24/7.

Frequently asked questions

Do we need to rewrite the application?

Rarely. Most inherited applications can be secured and modernised step by step. The risk map shows where a rework is worth it and where a fix is enough.

Our supplier is still around. Is that a problem?

No. The platform gives you an independent measure of what is delivered: actual quality level, vulnerabilities, dependencies. Your supplier fixes, you watch the findings close.

Which older languages do you support?

All of them. From COBOL to C#, from PHP to TypeScript, from SQL to Python: the analysis depends on neither the language nor the framework.

What does a takeover cost?

Continuous monitoring costs EUR 0.01 excl. VAT per line of code per month, minimum EUR 250 excl. VAT per month. Fixes and modernisation by LuxApps, hosting and the SOC are quoted separately.

Go further

Secure vibe coding Code with AI without inheriting its risks. Discover → Infrastructure and SOC Sovereign hosting, backups, secrets and a 24/7 SOC. Discover → How it works The journey of a line of code, from commit to SOC. Discover →

Your software deserves better than a black box.

Describe your application: LuxGap replies within 24 hours with a firm quotation.

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€0.01 excl. VAT per line per month · Minimum €250 excl. VAT per month · 12-month commitment