Josef Ziegler
Staff Software Engineer at Google DeepMind
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolJosef Ziegler is a Software Engineering Manager and Tech Lead at Google with 13 years of experience building massive-scale distributed systems and data infrastructure for frontier AI, currently driving Gemini Post-Training Data in partnership with DeepMind. He combines a strong theoretical foundation in ML and algorithms with hands-on systems design—evidenced by architecting Spanner push-time validation across 100,000+ databases and high-throughput pipelines for model training and alignment. A past competitive programming medalist (IOI, MEMO, ACM ICPC) and ETH Zürich MSc graduate, Josef brings rare algorithmic rigor to production problems like scalable data sharing and Bigtable-backed indexing. He has a track record of cross-functional leadership that earned Google’s 2025 Core Tech Impact Award and roots in applied research from Disney Research on real-time localization and visible light communication. Notably, he also coaches and mentors talent—having served as Vice President and coach for the Swiss Olympiad in Informatics—bridging elite algorithmic thinking with pragmatic engineering.
13 years of coding experience
5 years of employment as a software developer
MSc Information Technology and Electrical Engineering, MSc Information Technology and Electrical Engineering at ETH Zürich
English, German, French, Chinese
Github Skills (7)
algorithms8
lossless-data-compression7
lossless5
linux4
compression4
csi4
security4
Programming languages (2)
Github contributions (5)
ippeb/LosslessDataCompression
Apr 2015 - Apr 2015
Contributions:95 commits, 3 PRs, 86 pushes in 12 days
losslesslossless-data-compressioncompressiondata-compression
ippeb/ACM-ICPC
Apr 2015 - Jul 2015
Standard Algorithms used in Competitive Programming Contests
Contributions:106 commits, 36 pushes, 1 branch in 3 months
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