Build, maintain, and evolve automated and manual test suites for mobile (iOS/Android) and web applications, as well as APIs, Perform API testing and validation of backend services using tools such as Postman, REST Assured, or similar, Conduct performance and load testing to identify system bottlenecks using JMeter, k6, or comparable tools, Own end-to-end production monitoring and performance visibility, Document, track, and prioritize defects, working closely with developers to reproduce, debug, and resolve issues, Contribute to test plans, quality metrics, and release readiness assessments, Collaborate with product, backend, and platform teams to improve testability and observability, Work with AI-powered development and testing tools to improve efficiency and signal quality