Identify performance-related requirements and analyze system behavior to predict potential issues. Develop and execute performance test plans, including load, stress, and scalability testing. Identify and resolve performance bottlenecks in applications and databases, collaborating with development teams for optimization. Implement real-time performance monitoring solutions and utilize profiling tools for code and database optimization. Assess resource requirements for scalability and recommend infrastructure upgrades as needed. Troubleshoot performance-related incidents and collaborate with cross-functional teams to resolve issues. Maintain documentation of performance testing activities, results, and recommendations, while advocating for performance best practices.