# Sabrina Day

> Multimodal AI | Virtual Human Expert | @ Luma AI | ex-Meta, Oculus

Location: Santa Cruz, California, United States
Profile: https://flows.cv/sabrinaday

✨🔮 AI Model Whisperer | Behavioral Systems Architect | Human–Model Translator 🔮✨

I specialize in the rigorous evaluation of generative AI and creative systems operating at the edge of human perception and machine capability. My background bridges cognitive and behavioral science, multimodal interaction, and expressive technologies—focused on aligning model performance with the richness and variability of human nuance.

At the intersection of technical research and human experience, I design frameworks that probe not only whether models work, but whether they make sense—causally, emotionally, and contextually. My approach is equal parts science and storytelling: measuring fidelity in motion and expression while ensuring systems grasp the subtleties of behavior, culture, and intent.

In essence, I translate between worlds—making model behavior legible, surfacing hidden gaps, and shaping systems that feel less like tools and more like collaborators.

## Work Experience
### Qualitative Evaluation Engineer @ Luma AI
Jan 2025 – Present | Palo Alto, California, United States
→ Luma's Applied Research team 
→ First qual engineer at the company 
→ Set the qualitative bar for multimodal generative AI quality across the company
→ Architect the evaluation frameworks that guide model training, product decisions, and launch readiness
→ Own and scale the human-evaluation pipeline as a core product and research capability
→ Drive data strategy by identifying systemic gaps in training and evaluation datasets
→ Serve as the internal authority on human behavior, emotion, and expression in generative outputs
→ Influence product, research, design, and GTM decisions

### Behavioral Systems Researcher @ Meta
Jan 2020 – Jan 2025 | Burlingame, California, United States
→ Product Strategy: Drove avatar direction through behavioral research and facial science; prioritized high-impact features and improved user satisfaction across Meta platforms, including Quest, Instagram, and AI Studio.
→ Research Leadership: Led 3+ simultaneous research initiatives at a time supporting product validation and system-level refinement across emerging, human-centered technologies.
→ Testing & Optimization: Executed iterative testing cycles to inform product decisions, improve system responsiveness, and advance real-time expression fidelity.
→ Evaluation Standards: Built and standardized FACS and UX-based frameworks used to evaluate expression fidelity and model alignment across 7+ high-visibility projects.
→ Cross-Functional Leadership: Aligned engineering, product, design, and cross-org teams by translating insights into roadmap shifts, product refinements, and system-wide cohesion.

Projects include: 
→ Audio-to-Expression - model optimization, data integrity, QA authority 
→ Codec Avatars - model evaluation, data collection 
→ Horizon Avatars - avatar design, UX frameworks, model evaluation 
→ AI Studio/ AI Agents - quality standards, model evaluation

### Senior Research Assistant @ Oculus VR
Jan 2019 – Jan 2020 | Menlo Park, California
Senior RA for Oculus VR - Face Tracking & Avatar Research

### Research Assistant @ Oculus VR
Jan 2018 – Jan 2019

### Usability Analyst @ SellHound
Jan 2018 – Jan 2018 | Santa Cruz, California


## Education
### Master of Science - MS in Computational Media
University of California, Santa Cruz

### Bachelor of Science - BS in Cognitive Science
University of California, Santa Cruz


## Contact & Social
- LinkedIn: https://linkedin.com/in/sabrina-day

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Source: https://flows.cv/sabrinaday
JSON Resume: https://flows.cv/sabrinaday/resume.json
Last updated: 2026-04-11