Senior Data Scientist
Zefr
About this role
Zefr is seeking a Senior Data Scientist to work on research and deployment of Large Language Models for social media content understanding. The role involves handling multi-terabyte datasets from major social media platforms, fine-tuning models, and building scalable AI systems.
Skills
About Zefr
zefr.comZefr is a leading technology company specializing in AI-powered content classification for digital advertising, focusing on brand safety and suitability in complex social platforms. With patented AI technology, Zefr processes billions of content types daily to ensure brands' advertising effectiveness while upholding social responsibility and compliance. The company's solutions enable effective targeting and post-campaign verification, making them an essential partner for brands navigating the digital landscape. Zefr is committed to delivering transparency and innovative solutions, which positions them at the forefront of the brand suitability market.
Recent company news
ADWEEKZefr Appoints Andreia Todd as VP of Global Brand Marketing
Oct 9, 2025
Business WireZefr Awarded New U.S. Patent for AI-Powered Content Classification Process
Dec 16, 2025
Inc.comHow Accel-KKR Helped This Software Company Close a Key AI Deal
Oct 28, 2025
Ad AgeZefr’s Richard Raddon is cleaning up social media for brands
May 19, 2025
PR NewswireZefr and Meta Announce Expanded AI-Powered Brand Suitability Solution, Now Available on Facebook & Instagram Reels
Oct 10, 2023
About Zefr
Headquarters
San Francisco, CA
Company Size
201-500 employees
Founded
2018
Industry
Technology
Glassdoor Rating
4.2 / 5
Leadership Team
Sarah Johnson
Chief Executive Officer
Michael Chen
Chief Technology Officer
Emily Williams
VP of Engineering
David Rodriguez
VP of Product
Jessica Thompson
Chief Financial Officer
Andrew Park
VP of Sales
Unlock Company Insights
View leadership team, funding history,
and employee contacts for Zefr.
Salary
$200k – $225k
per year
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