• Conducted ad-hoc, smoke, and exploratory testing to ensure product stability, reliability, and functionality. • Performed e-commerce testing, exploratory testing, usability testing, regression testing, cross-browser/cross-platform testing, localization testing, and accessibility testing.• Developed and implemented checklists for validating the platform's core business processes, enabling the early identification of critical issues. • Documented identified defects in Google Sheets, ensuring clear traceability and tracking of fixes, thereby reducing the number of bugs in the program by 30%. • Created detailed test cases and comprehensive error reports in Jira, facilitating effective issue management and prioritization. • Conducted retesting using Jira and Google Sheets to confirm defect fixes.• Developed and managed test scenarios in TestCaseLab, which optimized test coverage and quality control. • Collaborated with Postman for API testing.