Summary
Software QA Engineer with 8+ years of experience testing API-driven, database-backed and transaction-oriented systems. Hands-on validation of payment processing, inventory synchronization, real-time server interactions, and failure recovery scenarios.
Strong in SQL-based data verification, log-driven debugging, and system behavior analysis under retry, timeout, and concurrent access conditions.
Professional Experience
Independent Projects & Technical Research (2024–Present)
- Designed and tested API-driven multi-tenant systems with isolated configuration handling.
- Built Python-based validation tools for backend logic and integration testing.
- Explored Redis caching behavior, retry mechanisms, and timeout recovery patterns.
- Prototyped WebSocket-based real-time interaction and state synchronization flows.
Senior QA Engineer (2019–2024)
- Tested SaaS portal and core e-commerce engine.
- Validated online payments (refunds/chargebacks), idempotency keys, and webhook reliability.
- Tested POS backend + receipt printing service deployed across 2,000+ machines.
- Validated SSO flows, permissions, promo/discount abuse scenarios (duplicate apply, concurrency).
- Investigated production incidents using Kibana logs and SQL queries.
- Release validation in Kubernetes environments (pods/logs/basic troubleshooting).
QA Engineer (2015–2019)
- Web/mobile functional testing with strong backend validation focus.
- API testing and SQL-based data verification.
- Release cycles, defect triage, test case base (TestRail → TestOps).
Selected Technical Projects
- Implemented JWT authentication with token blacklist validation and role-based access control.
- Developed API validation suites using pytest and asynchronous HTTP clients.
- Built Docker-based document processing workflows with structured validation pipelines.