Jisi Liu
Data Scientist Manager - Marketing Intelligence
Virginia, United States
Summary
🤩
Rockstar🎓
Top SchoolJisi Liu is a data science leader with 15 years of experience, currently managing Marketing Intelligence at Capital One after progressing through Principal and senior data science roles focused on fraud detection and card data. Trained in statistics (University of Virginia) with a physics background, Jisi blends rigorous statistical methods and practical big-data engineering—R, SAS, SQL, Spark, and AWS—to turn messy clickstream and marketing data into actionable insights. He has a track record of building customer segmentation and unsupervised models, automating reporting pipelines, and presenting clear, evidence-driven recommendations to stakeholders. An active contributor to open-source, he improved Java Nano support in Google’s protobuf compiler, reflecting an ability to bridge research, analytics, and systems-level development. Based in Virginia, he enjoys tackling ambiguous problems and rapidly learning new tools to deliver measurable business impact.
15 years of coding experience
7 years of employment as a software developer
physics, physics at Beijing Normal UniversityMaster of statistics, Master of statistics at University of Virginia
Chinese, English
Github Skills (8)
javas10
protobuffer10
protobuf10
java10
compiler-design9
api-design7
apim7
api7
Programming languages (8)
Github contributions (5)
protocolbuffers/protobuf
Apr 2015 - Mar 2017
Protocol Buffers - Google's data interchange format
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 releases, 31 commits, 455 PRs in 1 year 11 months
Contributions summary:Jisi contributed to the protobuf project by integrating a Java Nano generator into protoc. They modified the main compiler file to support Java Nano generation, which included adding a new generator, adding supporting functionality such as the generation of map fields, and initial parsing support for these maps within the JavaNano compiler. These changes aimed to improve the support for JavaNano within the protobuf ecosystem.
protocol-buffersrpcgoogle-protocol-buffersinterchange-formatmarshalling
liujisi/protobuf
Jan 2015 - May 2018
Protocol Buffers - Google's data interchange format
Contributions:210 pushes, 164 branches in 3 years 4 months
protocol-buffersgoogle-protocol-buffersinterchange-formatprotobufbuffers
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