Design, implement, and maintain comprehensive test strategies Develop and execute end-to-end tests for React/Express TypeScript applications using Cypress Create and maintain test plans for Go-based executables and terminal applications Perform REST API testing and validate integrations Conduct cross-platform testing across Linux and Windows environments Build and maintain automated pipelines in GitHub Actions Implement regression, smoke, and performance testing Monitor and optimize AI service performance, observability, and prompt versioning Establish benchmarks for AI endpoints and analyze results Collaborate closely with developers, DevOps, and product teams Document QA procedures, findings, and quality metrics Mentor junior QA engineers and champion best practices