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Harvey Zhang
Staff Platform Engineer specializing in healthcare systems and observability
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About
Hands-on production engineer with deep Oracle tuning and observability-driven troubleshooting experience in a 24x7 healthcare system used by pharmacists across the U.S. While not yet hands-on with GCP databases, they bring strong transferable cloud and platform experience from AWS/Azure, including migration work, memory leak remediation, HA/DR operations, and end-to-end performance debugging across DB, JVM, and network layers.
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Key Strengths
- Production Oracle performance tuning in 24x7 HA healthcare environment
- Fast root-cause analysis using Dynatrace and observability tooling
- Resolved high-concurrency DB session storms caused by microservice loop design
- Improved engineering practices through developer training and code review standards
- Contributed to on-prem to AWS lift-and-shift migration
- Identified and solved memory leaks blocking effective autoscaling
- Cross-layer debugging across database, JVM, network, and transaction flow
- Designed mature Jenkins and Chef-based deployment and rollback processes
- Strong reliability and incident-response mindset for high-severity production issues
Reference Highlights
- director-level trust and responsibility
- led observability and performance management activities
- helped define microservices architecture
- contributed to modernization of 2 legacy systems
- enabled cloud-native transformation
- improved operational efficiency
- delivered monthly cost savings
- achieved high availability
- achieved 99.98% uptime
- high performance in incident response
- strong SRE capability
- created automations for root cause detection
- used telemetry to drive performance tuning
- sustained 99.98% SLA for 3 to 4 consecutive years
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Experience
Education
Awards
Skills
Languages
Publications
2 publications
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