Yichen An
Data Infrastructure Engineer @Subtle Medical
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WORK HISTORY
Data Infrastructure Engineer @Subtle Medical
Menlo Park, CA, US
Architected a high-throughput, fault-tolerant DICOM ingestion pipeline, utilizing Postgres SKIP LOCKED queues and decoupled Staging tables. Achieved 20× throughput and enabled horizontal scaling of 12+ concurrent processors by eliminating database contention.Resolved critical infrastructure bottlenecks (OOM & I/O thrashing) by refactoring the ingestion engine with Lazy Loading patterns and hybrid File-Lock serialization. Reduced memory footprint by 95% and ensured stability for massive batch processing on resource-constrained instances.Engineered data consistency and observability mechanisms, implementing idempotent upserts, dirty-cache invalidation, and automated orchestration for unattended 24/7 operations. Built Prometheus metrics for real-time monitoring of lock contention and system latency.
EDUCATION
University of Southern California
Master of Science - MS, Applied Data Science
Penn State University
Bachelor of Applied Science - BASc, Data Processing and Data Processing Technology/Technician
ABOUT YICHEN AN
I enjoy solving system-level problems, improving reliability at scale, and building practical AI that fits real-world healthcare environments.
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