Customizing existing software
You already have a system: a CMS, a CRM, an online store or an app someone else built. We study the code first, then change it to fit how you work today.
What we do
Working with someone else’s code always starts with understanding it. After that, the changes themselves are usually faster than a rewrite.
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Code audit & takeover
We review the code, infrastructure and documentation, and tell you plainly what state it’s in before we change anything.
- Written audit with risks and priorities
- Repository and test environment setup
- Handover from previous developers
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New features & changes
Add modules, change business logic, rework screens or connect new services without rebuilding the system from scratch.
- New functionality on top of existing code
- Integrations with third-party services
- Interface and workflow changes
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Modernization & fixes
Update outdated frameworks and dependencies, fix long-standing bugs, and improve speed and security.
- Framework, PHP and Node.js upgrades
- Performance and security fixes
- Refactoring of problem areas
Systems we work with
Common platforms and frameworks we’re asked to adapt. If yours isn’t listed, send us a description and we’ll tell you honestly whether we’re a good fit.
- WordPress
- WooCommerce
- Laravel
- Symfony
- Yii
- Drupal
- Magento
- Shopify
- Odoo
- React
- Vue
- Node.js
- Python
Questions about customization
Didn’t find yours? Ask us directly.
Why does customization start at €2,000?
Before changing someone else’s code, we have to set up the environment, read the code and find the risky parts. That groundwork is included in every project, and it’s what keeps the changes safe.
The previous developer left no documentation. Can you still help?
Yes, that’s a typical situation. We document what we find during the audit, so the next person, whether us or someone else, has a map.
Will you need to rewrite everything?
Rarely. We recommend a rewrite only when maintaining the existing code would cost more over time, and we explain the reasoning with numbers.
Can you work on a live system without downtime?
We make changes in a separate test environment first and release them in small steps, at a time agreed with you.
Other services
Sometimes the better answer is a new piece next to the old system.
Stuck with software that almost fits?
Tell us what the system is built on and what should work differently. Access details can wait until we’ve talked.
Director@vilnexsystems.com