Sergii Gaievsky Email & Phone Number

Driving the development and enhancement of the company’s flagship product while ensuring high-quality, efficient, and scalable software solutions. Key contributions include:• Designed and developed new features and product enhancements, contributing to improved performance and user satisfaction.• Developed and integrated an Email Module and Google Storage Module using Apache Camel, ensuring seamless functionality and efficient data handling.• Collaborated with cross-functional teams to deliver high-quality software solutions within tight deadlines.• Participated in code reviews, promoting best practices and improving overall development processes.• Mentored and guided new developers, fostering their technical growth and integration into the team.

Contributed to the development and maintenance of W2 TICKETING (BSP markets), focusing on creating new functionality, optimizing system performance, and integrating new clients.• Designed and implemented new features to enhance product capabilities and user experience.• Built a microservice from scratch, adhering to best practices in microservice architecture for scalability and reliability.• Improved existing modules, resulting in significant performance gains in request processing.• Integrated and configured connections for new clients, ensuring seamless onboarding and compatibility.• Refactored and optimized legacy code to improve performance and maintainability.• Managed relational databases (e.g., PostgreSQL), optimizing queries for better performance.• Practiced Test-Driven Development (TDD) using JUnit 5 and Cucumber for robust testing.

Developed and enhanced a comprehensive web-based platform for efficient event management and registration. Key contributions and features include:• Designed and implemented new features to improve user functionality and engagement.• Optimized database queries, increasing overall system performance by over 2x.• Refactored and optimized code, improving webpage response times by over 3x.• Mentored junior team members, providing guidance on coding standards, best practices, and system architecture, which improved team productivity and code quality.• Provided access to over 30 real-time and pre-defined registration and financial reports.• Implemented one-click printing and exporting of reports.

Key contributor to a software engineering team, responsible for building and optimizing internal tools and integrating third-party systems to enhance business operations.• Integrated third-party APIs, including payment gateways and analytics platforms, ensuring seamless interoperability and improving operational efficiency.• Designed and developed a traffic distribution system to optimize channel, campaign, and vertical performance, reducing traffic losses by 10% and improving ROI by 7%.• Conducted extensive code refactoring to enhance system performance and scalability, achieving a reduction in cloud service costs 20%.