As a Senior QA Engineer, you will lead QA strategy for key product initiatives, from test planning to implementation and automation. Build and maintain both unit and end-to-end tests using modern frameworks (Cypress, Playwright, Mocha, etc). Use AI tooling (e.g. Claude, Codex, Cursor) to streamline test writing, refactoring, bug reproduction, and documentation. Collaborate with engineers, designers, and product managers to ensure a quality-first approach across all releases. Investigate, triage, and verify issues reported by users or internal stakeholders. Support continuous integration (CI) pipelines and help define deployment-readiness criteria. Participate in code reviews, pair programming, and QA retrospectives to continuously improve quality culture. Contribute to test documentation, regression libraries, and quality benchmarks.