Design, develop, and execute Performance test plans, test cases, and test scripts. Collaborate with developers, business analysts, and other QA team members to understand integration points and requirements. Perform end-to-end testing of software systems, APIs, and third-party integrations. Identify, document, and track defects using issue tracking tools (e.g., JIRA). Validate data flow and system interactions across multiple platforms. Participate in Agile/Scrum ceremonies and contribute to continuous improvement initiatives. Ensure compliance with quality standards and best practices in integration testing. Provide feedback and recommendations for improving system architecture and integration design.