Katsiaryna Zhukava

Backend-focused development on a large-scale SAP Commerce e-commerce platform using Java (Spring Boot) and GraphQL. Worked on checkout, payments (Apple Pay, Google Pay), order processing, refunds, and customer accounts. Maintained integrations with payment providers, CRM, CMS, marketplace, search, and logistics systems. Improved reliability and performance through backend refactoring and optimization. Added features, including age verification and data exports in Agile/Scrum teams.

• Developed backend services and REST APIs using Java (Spring, Spring Boot) • Designed and implemented authentication and authorization using Spring Security • Optimized database performance (PostgreSQL, MySQL, JDBC, JPA) • Integrated third-party APIs and external services • Developed real-time features using WebSockets • Collaborated with frontend teams (React, JSP) for seamless client-server integration • Contributed to system design, scalability improvements, and code reviews in Agile environment