Rocky DC — Senior QA Engineer | Freelance Quality Assurance

Acted as key QA driver ensuring data accuracy and reliability for business-critical seller analytics, directly impacting platform trust and adoption across a large seller base.
Supported multiple high-impact product initiatives including dashboards, seller tools, and data-driven features.
Detected and resolved 100+ pre-release defects (including critical issues), achieving a ~98% defect detection rate and significantly reducing production risk.
Identified critical data accuracy issues (e.g., traffic source inconsistencies and data synchronization gaps), preventing misleading analytics and poor user experience.

Designed and implemented a custom data validation script to verify category, annotation, and brand mapping consistency between legacy and target systems.
Detected hundreds of category mismatches and thousands of annotation inconsistencies, preventing large-scale data integrity issues during migration.
Automated large-scale data comparison across ~25,000 records, reducing validation effort from multiple days to ~2 hours.
Built backend automation test suite (TeslaGo) covering 28 endpoints with full test coverage before the execution phase, enabling faster and more reliable validation cycles.

Led end-to-end QA validation strategy for large-scale data migration, combining automation, data validation, and performance testing to minimize release risk.
Executed performance/load testing across 40+ endpoints using Rhino and Hammerflux, ensuring stable latency and system reliability during migration.
Identified and reported data discrepancies in analytics outputs post-migration, ensuring accuracy of key business metrics.
Delivered a high-quality release with zero critical production issues (P0/P1/P2), zero incidents, and no SLA/redline violations post-migration.

Tools Used

POSTMANTESLAGORHINOLOCUSTGOLANGAEOLUSSQLREST-ASSUREDJAVAXRAYJIRA

Designed and executed a comprehensive manual test suite covering 362 test cases across 8 modules, achieving a 100% pass rate with zero failed or blocked cases.
Conducted security-focused testing on role-based access control, identifying critical privilege escalation vulnerabilities and unauthorized data access issues.
Identified and reported 50++, ensuring all critical issues were resolved before release.
Executed load testing across 4 endpoints simulating 20 concurrent users over 30 minutes (~36,000 total requests), confirming stable performance at 20 RPS with zero errors.
Validated API gateway business logic for a blockchain-based logging platform serving enterprise clients in the insurance and financial sector.

Conducted exploratory testing and functional validation, focusing on identifying high-risk issues in user flows and system behavior.
Identified critical vulnerabilities in business logic, particularly in account creation and usage limitation mechanisms.
Executed security-focused test scenarios including input validation, file upload handling, and metadata inspection.

Tools Used

POSTMANLOCUST

Created and managed Test Plans and Test Cases using Spreadsheet-based documentation.
Built and managed backend integration tests using Mocha Chai, integrated with GitLab CI workflow for continuous quality control of the development pipeline.

Tools Used

MOCHACHAIGITLAB-WORKFLOWJAVASCRIPTPOSTMAN

Designed, managed, and executed manual test cases and test plans for UI and backend integration testing across banking and financial features.
Performed manual API testing using Postman, verifying correctness of transactional and financial endpoints.
Conducted functional, regression, and sanity testing across multiple release cycles to ensure product stability.
Documented and evaluated test results and bug cycles, maintaining clear traceability of defects across the SDLC.

Tools Used

POSTMANJIRA

Quality
Assurance
Engineer.