Legacy Systems & Code Maintenance

Expert Care for Legacy Systems

Our expert collective specializes in maintaining, rescuing, and modernizing legacy systems for family offices and private clients in Switzerland and Germany. From CodeIgniter and Typo3 to outdated PHP applications, we ensure your critical systems remain secure, stable, and maintainable.

Our Legacy System Services

🔧 Legacy Code Maintenance

Keep your legacy systems running smoothly with expert maintenance and bug fixes. Our team has deep experience with older codebases and frameworks that many developers no longer support.

CodeIgniter Typo3 Legacy PHP Old Symfony
  • • Bug fixes and security patches
  • • Performance optimization
  • • Dependency updates and compatibility
  • • Documentation and knowledge transfer
  • • Emergency support and troubleshooting

🏥 System Rescue & Recovery

When legacy systems fail or become unmaintainable, we step in to rescue critical applications. Our team diagnoses issues, stabilizes systems, and restores functionality.

  • • Emergency system recovery
  • • Critical bug diagnosis and fixes
  • • Data recovery and migration
  • • System stabilization
  • • Reverse engineering undocumented systems

Modernization & Migration

Transform legacy systems into modern, maintainable applications. We plan and execute migrations to current frameworks and technologies while preserving business logic and data integrity.

PHP 5 → PHP 8 Old Symfony → Symfony 6 Framework Migration
  • • PHP version upgrades (5.x to 8.x)
  • • Framework migration (CodeIgniter to Symfony/Laravel)
  • • Database migration and optimization
  • • Refactoring to modern patterns
  • • Gradual strangler fig pattern migrations

📋 Technical Debt Reduction

Systematically reduce technical debt in legacy codebases. We refactor, add tests, improve documentation, and modernize infrastructure to make systems more maintainable.

  • • Code quality assessment and improvement
  • • Adding automated tests to legacy code
  • • Refactoring and code cleanup
  • • Documentation creation
  • • Dependency modernization

🔒 Security Hardening

Secure legacy systems against modern threats. We audit code for vulnerabilities, apply security patches, and implement protections to safeguard your data and operations.

  • • Security audits and vulnerability assessment
  • • SQL injection and XSS protection
  • • Authentication and authorization improvements
  • • Dependency security updates
  • • GDPR and compliance improvements

📊 Legacy CMS Management

Specialized support for legacy content management systems including Typo3, Drupal, and older WordPress installations. We maintain, secure, and modernize CMS platforms.

Typo3 Drupal Old WordPress
  • • Typo3 maintenance and upgrades
  • • Custom extension development and fixes
  • • Content migration and restructuring
  • • Performance optimization
  • • Security hardening and updates

Legacy Technologies We Support

PHP Frameworks

CodeIgniter 2/3 Old Symfony (1.x-4.x) Zend Framework CakePHP

CMS Platforms

Typo3 Drupal 6/7 Joomla Old WordPress

PHP Versions

PHP 5.x PHP 7.x PHP 8.x Upgrades

Databases

MySQL 4/5 PostgreSQL Oracle MS SQL

Recent Legacy System Projects

E-commerce Platform Modernization

Migrated a critical e-commerce platform from CodeIgniter 2 and PHP 5.6 to Symfony 6 and PHP 8.2, maintaining all business logic while improving performance by 400% and adding modern security.

CodeIgniter → Symfony • PHP 5.6 → 8.2 • MySQL Optimization

Typo3 Security Rescue

Secured and updated a compromised Typo3 6.x installation for a private client, removing malware, patching vulnerabilities, and upgrading to Typo3 12 LTS with zero downtime.

Typo3 6 → 12 LTS • Security Audit • Malware Removal

Legacy System Documentation

Reverse-engineered and documented an undocumented legacy PHP application for a family office, enabling continued maintenance and future modernization planning.

Reverse Engineering • Documentation • Knowledge Transfer

PHP 5 to PHP 8 Migration

Successfully migrated a complex business application from PHP 5.4 to PHP 8.1, updating deprecated functions, refactoring code, and implementing modern coding standards.

PHP Version Upgrade • Code Refactoring • Testing

Why Choose Us for Legacy Systems

Deep Legacy Expertise

Our collective has maintained legacy systems since the early 2000s, with hands-on experience in frameworks and technologies most developers no longer touch.

Risk Mitigation

We understand the risks of working with production legacy systems. Our careful, methodical approach minimizes downtime and data loss.

Clear Migration Paths

We provide realistic modernization roadmaps, whether gradual refactoring or complete rewrites, with clear timelines and risk assessments.

Need Help with Legacy Systems?

Schedule a confidential consultation to discuss your legacy system maintenance or modernization needs.