Increased automated regression coverage to ~75% by building a modular Selenium+Java+TestNG framework (POM, reusable waits, data-driven tests).

Cut regression cycle time ~45% by enabling parallel runs on Selenium Grid/Sauce Labs and wiring the suite into Jenkins with GitHub webhooks.

Introduced Cucumber BDD (120+ step definitions); improved stakeholder readability and reduced onboarding time by ~1 week for new testers.

Implemented API test suites in Postman/Newman (200+ requests, environment variables, scripts), catching contract drift early and reducing production incidents ~30%.

Built SQL checks (inner/left joins, group by) to validate ETL outputs; prevented data quality issues and cut defect reopen rate by ~22%.

Led weekly defect triage with Jira/Zephyr, improved first-time fix rate and maintained a clean requirements-to-tests traceability.

Authored 400+ test cases mapped to user stories and acceptance criteria; drove ~35% reduction in post-release defects via stronger coverage.

Executed functional, integration, end-to-end, smoke, and UAT cycles; logged precise defects with severity/priority to speed engineering turnaround.

Created a lightweight performance smoke in JMeter/BlazeMeter for 10 key endpoints; detected a >15% latency regression before GA.

Assisted mobile sanity testing (Appium basics) for iOS/Android builds; validated critical user journeys and install/upgrade paths.

Mentored two junior QAs on test design techniques (boundary values, equivalence classes) and Agile ceremonies.