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Tested Web exchange workflows across Wallet, Referral/Affiliate, Spot, Futures, Convert, fees, funding, liquidation, and KYC in Chrome, Edge, and Firefox. Used Browser DevTools, API/WebSocket inspection, TablePlus SQL, and spreadsheet calculations to compare expected and observed results. Reproduced, documented, and escalated three high-severity financial-logic defects covering trading boundary handling, multi-tier referral commission allocation, and Convert cross-entry boundary handling. All three defects were acknowledged and escalated for priority handling, and remained open when I left. Authored 30–50 Referral/Affiliate test cases in TestRail (first review completed before departure) and about 20 Convert test cases and study scenarios in the internal Wiki; used TestRail for Wallet cases and wrote onboarding study notes and defect investigation pages.

Led six Automation Engineers in a fully remote ASML engagement covering HMI eP5 modules iCDU, MM Flow, and ADEL. Managed weekly progress via custom Jira Filters/JQL, test-case reviews, annual formal performance reviews I conducted for each engineer, status and training-need reporting to ASML management, TOI, and live demos. Implemented a portion of test cases as Python automation scripts within the TestComplete framework and reviewed the team's code. Improved the existing TestComplete architecture and designed the Simulator setup, Recipe loading, execution, reporting, cleanup, and reset lifecycle. The normal path ran unattended through .bat or Atlassian Bamboo; connection failures required manual investigation. Assessed full versus partial automation and planned shared modules before assignment. Contributed direct test implementation alongside the team; the engineers completed most coding.

Worked in core SEG (Service Engineering Group) support engineering and product QA for the DLP SDK and enterprise security products (OfficeScan, WFBS-SVC, IMSVA), serving as QA Leader and SEG Leader; participated in candidate interviews during the DLP period (self-reported; no employer record available). Reviewed escalation evidence, returned incomplete cases to L2 with collection requests, and assigned complete cases by priority, complexity, and workload. Handled incident RCA and hotfix validation using logs, dumps, WinDbg, ProcMon, Process Explorer, and reconstructed customer environments; automated regression suites (Python, Selenium, Robot Framework, TMSTAF, Jenkins). Wrote Python monitoring via Google APIs (googleapis.com) that linked Chrome Beta/Stable updates to DLP upload-blocking tests and failure alerts. Proposed supported-site scanning, adopted and implemented by the team during a DLP refactor; based on my recollection of the QA performance test report, CPU and memory usage each fell by at least 10% relative to the previous design, with an explicit unsupported-site boundary. Initiated an issue-type-based DLP diagnostic guide; in its first month, the share of cases SEG returned to L2 for missing information fell by 20 percentage points, according to figures shared by my manager. Received Trend Micro's internal Yearly Best SEG Engineer recognition in 2019 and 2021.

Served as SEG (Service Engineering Group) Leader and the final escalation point for critical WFBS Advanced incidents across APAC, Europe, and the US. Investigated dumps and upgrade evidence, reconstructed customer paths for hotfix validation, and proposed the WFBS Guide Book to improve diagnostic collection and reduce missing-information case returns.

Owned module, system, and long-running performance testing for Worry-Free Business Security Advanced (6.0 SP1–7.0 SP1). Used Python and Windows Performance Monitor for resource and stability checks. Served as Internal and External Beta Owner, planning and executing customer-environment beta validation and collecting field diagnostic evidence across Europe.

Developed and validated C firmware for European/US LCD TVs, including OSD UI and audio/video calibration, and Java control systems for smart meters. Collaborated with hardware and manufacturing teams on stable production releases and a GE OEM engagement.