Ryan Cerf
Data Engineer
San Francisco Bay Area United States
Summary
🤩
Rockstar🎓
Top SchoolRyan Cerf is a data engineer with 11 years of experience based in the San Francisco Bay Area, currently building data solutions at Google after progressing from an analyst role there. He blends strong analytical grounding from a B.A.Sc. in Economics and Finance with practical software development experience gained earlier in his career and at a startup. Ryan contributes to open-source, notably improving performance and usability in the Java dataframe library Tablesaw through bug fixes, type conversions, and join optimizations. His work focuses on making data pipelines reliable and efficient, reducing edge-case inconsistencies and improving aggregation and join semantics. Colleagues would describe him as a pragmatic problem-solver who values clean, performant data tooling and measurable impact. He brings the discipline of finance-informed analysis to engineering decisions, helping teams turn messy data into dependable insights.
11 years of coding experience
1 year of employment as a software developer
California Polytechnic State University, San Luis Obispo
Github Skills (10)
javas10
java10
dataframe10
data-analysis10
api-design9
data-structure9
performance-optimization9
data-structures9
refactoring8
testing8
Programming languages (6)
Github contributions (5)
jtablesaw/tablesaw
Jul 2019 - Oct 2019
Java dataframe and visualization library
Role in this project:
Back-end Developer
Back-end DeveloperContributions:29 commits, 30 PRs, 5 pushes in 2 months
Contributions summary:Ryan primarily contributed to bug fixes and improvements within the tablesaw Java dataframe library. Their work included resolving issues related to aggregation of data in TableSliceGroup, inner join operations, and providing new functionality to convert columns between types. The user also optimized the performance of join operations and addressed inconsistencies in the `column` and `columns` method of tableslice, improving the library's usability and performance.
dataframejavavisualizationdata-framejava-dataframe
ryancerf/scrapy-sqlitem
Aug 2015 - Jul 2019
Scrapy extension to write items using sqlalchemy models
Contributions:8 pushes, 2 branches in 3 years 11 months
scrapysqlalchemy
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