SERGEY USTINOV

• Performed regression testing after deployments to test environments, validating critical functionality and identifying regressions before release.
• Validated changes associated with pull requests against requirements and assessed their impact on existing functionality.
• Reproduced and documented defects in detailed bug reports, including reproduction steps, expected and actual results, environment details, and supporting evidence.
• Retested resolved defects and confirmed that implemented fixes were ready for release.

• Develop and maintain Java backend components and web application features.

• Implement REST endpoints, business logic, persistence layers, and database integrations.

• Use Java, Spring Boot, Spring Data JPA, Hibernate, SQL/PostgreSQL, Git, and Maven/Gradle.

• Collaborate with developers and QA engineers to investigate defects and improve application reliability.

• Supported office IT infrastructure, employee workstations, network equipment, access permissions, and internal services.

• Resolved technical incidents and operational requests and assisted with system and environment configuration.

• Assisted with deployments, CI/CD tasks, monitoring, and maintaining stable service availability.