Audit
Complete code audit
Assessment of the quality, security and maintainability of your existing codebase.
Code takeover and modernization
Take back control of code developed by another provider
Your existing application has become unmanageable? We take over the code, audit it and modernize it. Technical audit, refactoring, documentation: get out of the deadlock and evolve your product with confidence.
Request an audit
Take back control of your application
Your application was developed by a provider who is no longer available? The code has become difficult to maintain, bugs are piling up, and evolutions are increasingly costly? You are not alone in this situation.
We have been taking over existing applications for years. Our team audits the code, identifies risks and proposes a clear action plan. No vague promises: concrete recommendations with precise estimates.
The goal: stabilize your application, reduce technical debt and allow you to evolve it serenely. We document everything, set up automated tests and train your teams if necessary.
A successful code takeover is not a blind rewrite: we start by mapping what actually works, then isolate the technical debt that truly weighs on future changes. Depending on the state of the codebase, the intervention can range from targeted refactoring to a progressive modernisation module by module.
Our fully remote team works with companies across France and Europe facing this kind of situation: vanished provider, retired developer, or simply code that has aged faster than the business. We adapt to the context rather than forcing a single method.
Expertise
A structured code takeover restores reliability, performance and security to your application, while extending its lifespan.
Rewriting
Refactoring
partial or complete of critical sections to make the code more reliable, performant and robust.
Migration
Stack migration
Transition to a framework or language to ensure compatibility and project longevity.
Guides
Technical documentation
Developer guides, APIs and installation procedures to facilitate future maintenance.
Tests
Tests and validation
Implementation of unit and functional tests to ensure reliable deployments.
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Case studies.
Code takeovers adapted to each situation
STARTUP
A startup had its MVP developed by an offshore agency and now needs to evolve it.
The solution provided: complete audit, refactoring of critical parts, test setup and documentation to allow the internal team to take over.
INSTITUTION
An administration uses business software whose original developer has retired.
The solution provided: code reverse engineering, complete documentation, fixing accumulated bugs and training the internal IT team.
SME
An industrial SME has an aging custom ERP that is hindering its growth.
The solution provided: audit and progressive modernization plan, migration to current technologies while preserving service continuity.
ASSOCIATION
A sports federation has a license management application that regularly crashes during renewal periods.
The solution provided: performance problem diagnosis, database optimization, load testing setup and monitoring.
Commitments.
Our standards for every code takeover.
Security
Reliable architecture, fine-grained access control, GDPR compliance.
Performance
Optimized response times and native scalability.
Simplified Maintenance
Documented code, automated tests, easy updates.
Scalability
Modular architecture designed to support your growth.
Continuous iterations
Short sprints, regular demos, real-time adjustments.
Transparent communication
A dedicated contact, regular updates, full visibility.
Clear and measurable tracking
Defined milestones, documented deliverables, shared progress.
Ongoing support
Technical support, corrective maintenance and feature evolution.
Projects.
Concrete custom development achievements
+ 150 projects delivered+ 10 years of experience
See all projects
Identify levers to strengthen farm autonomy
An extranet to centralize all information and documentary resources
Offer the most accurate mortgage simulation on the market
Provide tools to master energy consumption
Carry out genomic sequencing projects
Identify levers to strengthen farm autonomy
An extranet to centralize all information and documentary resources
Offer the most accurate mortgage simulation on the market
Provide tools to master energy consumption
Carry out genomic sequencing projects
Identify levers to strengthen farm autonomy
An extranet to centralize all information and documentary resources
Offer the most accurate mortgage simulation on the market
Provide tools to master energy consumption
Carry out genomic sequencing projects
Our approach.
A methodical and transparent takeover.
We analyze the source code, architecture, dependencies, security vulnerabilities and technical debt. You receive a detailed report with prioritized and costed recommendations. The audit also covers the classic application security issues that tend to linger in older code.
We fix critical bugs, update security dependencies and set up a clean development environment. The application continues to run during this phase. The most urgent technical debt is tackled first so the next evolutions stop being slowed down.
We document the architecture, business processes and APIs. We add automated tests to secure future evolutions and detect regressions.
A full technical audit with report and costed action plan sits between €5k and €12k depending on the size of the codebase. The follow-up stabilisation and refactoring phase starts around €20k–€40k for a mid-size application, and can climb to €80k–€150k for larger systems. The right approach is often to modernise rather than rebuild, which costs two to three times less than a full rewrite.
The audit takes 2 to 4 weeks depending on project size. The initial stabilisation phase (critical updates, security fixes, clean environment) runs 4 to 8 weeks. From there, progressive modernisation happens module by module at the pace that suits you, without disrupting the service. For heavily degraded cases, a rebuild scoping exercise can also be considered to compare both options with real numbers.
A code takeover keeps the existing application and improves it piece by piece, with no service disruption. A rebuild keeps the idea and the data but changes the stack and architecture. A rewrite starts from zero with fresh code. Takeover is almost always the best first move: cheaper, less risky, and it lets you judge afterwards whether a rebuild is really needed or whether the current architecture can last a few more years.
Benefits.
The advantages of a successful code takeover.
A well-managed code takeover transforms a problematic application into a reliable and scalable tool. You regain control of your application assets.
No more astronomical quotes for the slightest modification, bugs that keep reappearing, impossible updates. Your application becomes an asset again, not a liability.
And if you want to internalize maintenance, we train your teams and transfer all the necessary knowledge to them.
What our clients gain from a code takeover:
Faster and less costly evolutions thanks to clean code
Independence regained from the previous provider
Reduced technical debt and modernized architecture
Internal teams trained and autonomous on the code
Ready to get started?
From scoping to prototype, to AI integration.
We support your business software projects from start to finish.