ChangZhuo Chen (陳昌倬)

• czchen@czchen.org
• +886922140016
• https://linkedin.com/in/changzhuo

Working Experience

Staff Engineer, Netskope, Taipei 2024-03 – 2026-07

• Data Pipelines: Spearheaded the AWS version of the customer data ETL pipeline based on the GCP architecture. Scaled the system to support up to 260 tenants with per-tenant throughputs reaching 4.6 MiB/s, leveraging DuckDB and the Kubernetes API.
• Security & Authentication: Designed and implemented secure service-to-service authentication and authorization using Google Cloud KMS and JWT, establishing robust key rotation procedures.

Staff Engineer, Appier, Taipei 2014-11 – 2024-03

• High-Throughput Streaming: Built a stateful matching engine using Apache Flink to process up to 1.7M QPS (avg. 60K) at <5s latency. Achieved low latency (P50 ~300ms) user ID mapping for iOS 14 IDFA-less privacy enhancements.
• Data Ingestion: Scaled data feeds to sync product information from 10K to 6B entries per day utilizing MongoDB, Celery and RabbitMQ. Improved click-through rate by 20%–50% by utilizing Guetzli to reduce advertising image sizes.
• Agile Delivery: Orchestrated the migration of a near real-time pipeline of 10+ applications from AWS to GCP seamlessly within 2 weeks. Implemented a workaround to mitigate a critical Bloom filter false-positive issue in 3 days, restoring profitability for a customer representing 60% of revenue.
• GitOps & Infrastructure: Initiated and built the GitOps system from the ground up, orchestrating CI/CD processes for 1.4k+ Applications across 20+ Kubernetes clusters and 10 teams via Argo CD and Argo Workflows. Enforced infrastructure best practices via Gatekeeper/Open Policy Agent and established comprehensive observability via Grafana, SigNoz, and OpenTelemetry. Discovered and patched an upstream vulnerability CVE-2023-22736 in Argo CD.
• Cost & Resource Optimization: Pioneered the company's initial adoption of Kubernetes, leveraging autoscaling and Spot VMs to spearhead cost reduction initiatives that achieved 20%–50% savings.

Senior Engineer, Trend Micro, Taipei 2010-12 – 2014-11

• Performance Optimization: Accelerated scanning result generation by 80% using VMWare and MySQL. Reduced 99.99% VSAPI Android/ARM scanning time by finding misaligned memory access.
• Test Automation: Architected a one-click feature and regression testing framework in Linux via Borland SCTM and VMWare.

Senior Engineer, BenQ/Qisda, Taipei 2006-10 – 2010-12

• Test Automation: Increased automation rate from 20% to 80% for 24/7 GCF/PTCRB certification testing.

Open Source

Developer/Application Manager, Debian 2013-09 – present

• Community Leadership: Co-organized DebConf18 (first in Asia) with 200+ global participants at NCTU (NYCU).
• Package Maintenance: Maintain 170+ packages in collaboration with 10+ development groups.

Developer, 新酷音輸入法 (Intelligent Chinese Phonetic Input Method Library) 2012-09 – present

• Quality Assurance: Increased unit test coverage to 81% and integrated CI via Travis CI, Coveralls, and Coverity.
• Performance Optimization: Implemented an 800x faster dynamic programming algorithm to enhance composition performance.

Skills

Education