Hans - AI QA Engineer

Demonstrated experience with Claude API.

Demonstrated experience with Agentic Loops & Tool-Use Orchestration.

Demonstrated experience with LLM Planner / Tool Registry Design.

Demonstrated experience with RAG (ChromaDB).

Demonstrated experience with Prompt & Context Engineering.

Designed and executed LRE/VuGen scripts (C-based) across Web HTTP/HTML, TruClient, REST, and Web Services protocols, including script enhancements, correlation, and authentication troubleshooting (LDAP, SAML, SSO) in an Agile/Scrum framework.. Led performance testing for AWS/Kubernetes migration — validated scalability and ensured SLA compliance (<5s transactions, <2s services), increasing throughput 40%.. Integrated AppDynamics, Prometheus/Grafana, AWS X-Ray, Splunk, and SiteScope for observability and root-cause analysis, reducing defect resolution time 35%.. Performed performance testing across heavily integrated, multi-system environments — validating end-to-end transaction flows across REST/SOAP APIs, back-end services, and third-party system dependencies to ensure stability and SLA compliance under load.. Mentored junior engineers in performance engineering best practices and expanded defect detection coverage through broader integration test scenarios.

LoadRunner specialist for 9 years (2008–2017); developed and enhanced C-based VuGen scripts, scaled systems to 12,000+ TPS, increased throughput 35%, and maintained SLA compliance across Web, SAP, Citrix, and TruClient protocols in Agile/Waterfall environments.. Supported SAP CRM, ERP, BRIM, and FI modules with load, stress, volume, and scalability testing.. Conducted performance testing across complex, tightly integrated enterprise systems — including SAP, billing platforms, and internal APIs — identifying cross-system bottlenecks and validating data flow integrity under simulated production load.. Built LoadRunner automation frameworks reducing data preparation time 50% and improving defect detection 30%.. Additional roles: Test Environment Operations (3 yrs), PeopleSoft Administration (2 yrs), COBOL/CICS Programmer (5 yrs).

Developed and maintained COBOL, DB2, JCL, and CICS mainframe applications; converted from intern to full-time based on strong performance.