Senior QA Engineer responsible for functional testing of iOS, Android, and web applications. Develop and execute test cases, scripts, plans, and procedures across various development methodologies. Experience with Postman, Salesforce, Magento, VTEX, Dynamics 365, and cloud-based testing services (Sauce Labs, BrowserStack) is crucial. A deep understanding of the SDLC, various test cycles (unit, regression, functional, system, stress & scale, smoke & sanity), mobile/web application architecture, and deployment is required. Excellent analytical and problem-solving skills are essential, along with the ability to identify and explain not just 'what' went wrong, but also 'why'. Experience with load testing and backend services (APIs, databases, distributed services) is needed. Strong written and verbal communication skills are vital for documenting findings and collaborating effectively within an Agile environment. This role involves participation in release deployments to production.