Member of Technical Staff - Pre-Training Data is open at Reflectionai in San Francisco, CA. The posting gives no salary; similar roles in the United States advertise a median of $194K. Posted on Oct 22, 2026, and still on Reflectionai’s careers page when we last checked, on Nov 14, 2026.
About the role
Design and implement techniques for sourcing, curating, and filtering large-scale web, text, and code data, with opportunities to extend into other modalities as our models evolve. - Develop data quality metrics and analyses that measure coverage, diversity, and representativeness across sources. - Join the pre-training research team to design and run data experiments, working with infrastructure teams to scale the…
The opening lines of the posting. The rest is on Reflectionai’s careers page.
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