Job Title: Senior PHP Developer   
About the Job: 
We are looking for experienced Senior PHP Developer to support a critical system upgrade involving the migration of our PHP applications from PHP 7.3.33 to PHP 8.x. The selected candidates will play a key role in ensuring a smooth, secure, and high-quality migration while maintaining system stability and performance.
Key Responsibilities:
Assist in the migration of existing applications from PHP 7.3.33 to PHP 8.3+
Analyze legacy PHP code to identify compatibility issues and deprecated features
Refactor and optimize code to comply with PHP 8.3+ standards and best practices
Update and maintain dependencies, libraries, and frameworks to PHP 8.3+ compatible versions
Collaborate with QA and other developers to test, debug, and validate migrated code
Ensure application stability, performance, and security post-migration
Document migration changes, issues, and resolutions
Required Qualifications
Minimum 5 years of professional experience in PHP development
Strong hands-on experience with PHP 7.x and PHP 8.3+
Proven experience migrating or upgrading PHP applications between major versions
Strong knowledge of OOP principles and hands-on experience implementing design patterns (such as MVC, Singleton, Factory, Repository, and Dependency Injection) in PHP applications, algorithms and data structures 
Deep understanding of: 
PHP 8.3+ breaking changes and deprecated features
Error handling, typing, and performance improvements in PHP 8.3+ 
Strong knowledge of SQL relational databases (MSSQL is preferred) 
Familiarity with REST APIs, JSON, and backend integrations
Experience using version control systems (Git) 
Ability to write clean, maintainable, and well-documented code