Ivan Sergeev Email & Phone Number

Serbia

United States

Achievements and Contributions: - Enhanced Change-Log Management: Refactored the codebase to achieve consistency across multiple entities, leading to a 3-5x acceleration in feature maintenance. - Streamlined Onboarding: Documented over 200 legacy code fragments, greatly enhancing the onboarding process for new team members and enabling faster adaptation to the codebase. - Aligned PHPUnit Tests: Adapted and updated over 20 PHPUnit tests to match the latest functionality, ensuring reliability and consistency in testing. - Developed and Maintained Web App: Worked on the development, updates, and maintenance of a Symfony-based web app serving approximately 1,000 client employees and benefiting over 10 million of their customers. - Upgraded Legacy Systems: Migrated Symfony from version 4 to 6 and PHP from version 7.1 to 8.2, simplifying development workflows and speeding up new feature implementation. - Optimized Debugging Process: Introduced Xdebug and tunneling for remote server debugging, improving bug resolution efficiency tenfold over traditional methods. Conducted team training, which led to a significant enhancement in overall debugging speed. - Led Code Reviews: Conducted over 100 code reviews, deepening my understanding of SOLID principles and improving code quality, which increased my development speed by 30%. - Reduced Bug Potential: Implemented a solution to expedite change-log management, reducing potential bugs from 300 to just 6. - Mentored and Trained Team: Offered regular mentorship to junior developers and led training sessions on best practices, boosting the team’s overall skill set and productivity.Technical Expertise: - Key Technologies: PHP, Symfony, PHPUnit, Xdebug, Docker, Git, CI/CD, REST API, Composer.

Moscow, Russia

Experience Summary: - Diverse Tech Stack Management: Proficient in overseeing a broad backend stack, including WordPress, Symfony, Laravel, and databases like SQL, PostgreSQL, and MongoDB, with substantial expertise in PHPUnit for testing. - Frontend Proficiency: Skilled in utilizing React, Angular, Vue, and integrating Vue 3 with TypeScript. Directed version control through GitLab and optimized deployment via CI/CD pipelines. - Project Leadership: Led and executed 110 projects over nearly five years, effectively launching more than ten projects from inception. - Complex Integration Solutions: Seamlessly integrated various payment systems and backends such as Medialog and MindBox. - Project Refactoring: Refactored large-scale projects managing hundreds of thousands of site requests per day, reducing code complexity by eliminating 300k lines while adding 50k. Enhanced performance, improved SEO, and accelerated script execution from 2 minutes to 2 seconds. - Task Decomposition: Expertly decomposed tasks involving 3,000 hours of specialist work.

Moscow, Russia

- End-to-End Development: Delivered turnkey websites, modified existing projects, and maintained them using PHP, MySQL, JavaScript, HTML5. - Complex Integration Solutions: Effectively integrated various payment systems and backends such as Medialog and MindBox. - Project Refactoring: Refactored large-scale projects handling hundreds of thousands of site requests per day, reducing code complexity by deleting 300k lines while adding 50k.

Moscow, Russia

Web Development Expertise: - SEO and UX Optimization: Developed, modified, and optimized websites to meet SEO and UX requirements. Automated content filling processes, enhanced data parsing, and improved server script and front-end performance. - Team Collaboration and Client Engagement: Monitored the work of other developers, participated in client meetings, and assessed project requirements. Development primarily focused on CMS, with occasional use of WordPress.

Moscow, Russia

Turnkey Website Solutions: - End-to-End Development: Delivered turnkey websites, modified existing projects, and ensured ongoing maintenance using PHP, JavaScript, HTML5.