• Developing new functionality and maintain the existing codebase, including an accounting module for multiple companies united in one system and a rented premises management module. • Migrating core application from Yii1 to Yii2, developing new projects on Symfony 4/5, improving code maintainability and system performance. • Improving database structure and optimize SQL queries for better performance. • Performing code maintenance, refactoring, and debugging of PHP code. • Building and maintaining company websites on Symfony framework. • Integrating third-party services, including email sending services and online payment systems. • Participating in architectural decisions and code reviews. • Helping junior developers get up to speed with the project and codebase. • Working closely with product managers and other developers to find practical solutions - not just technically correct ones, but ones that actually make sense for the business and the users.