Sonia Joseph
Co-founder at Stealth
Princeton, New Jersey, United States
Summary
👤
Senior🎓
Top SchoolSonia Joseph is a visiting researcher and PhD candidate bridging neuroscience, computer science, and machine learning with eight years of hands-on experience in both academic and industry labs. She currently researches interpretable, physically plausible world models on Meta’s JEPA team while leading a 160+ member interpretability forum across FAIR, Reality Labs, and GenAI. Her work spans multimodal mechanistic interpretability—contributing to MATS cohorts and authoring the open-source Prisma library for vision interpretability and sparse autoencoders—and she co-founded Alexandria Labs, moving from CTO to strategic advisor after early-stage growth. With roots in computational neuroscience at Princeton and Janelia, she combines deep experimental analysis (calcium imaging, receptive field pipelines) with ML engineering for large models and RAG-style systems. Known for a playful AI “zoo” on GitHub and active community mentorship, she blends rigorous research with practical tooling that accelerates model understanding.
8 years of coding experience
5 years of employment as a software developer
Master's degree Computer Science, Master's degree Computer Science at McGill UniversityHigh School Diploma, High School Diploma at Acton-Boxborough Regional High SchoolDoctor of Philosophy - PhD Computer Science, Doctor of Philosophy - PhD Computer Science at Mila - Quebec Artificial Intelligence Institute / McGillBachelor of Arts (B.A.) Neuroscience, Bachelor of Arts (B.A.) Neuroscience at Princeton University
English, Latin
Github Skills (28)
prisma9
language-model8
receptive-field8
documentation-theme8
markdown7
hugo7
hugo-theme7
documentation5
gpt5
planet5
webscraper4
imaging4
location4
self-supervised-learning4
object-detection4
Programming languages (6)
Github contributions (5)
soniajoseph/MarkovLyric2
Aug 2019 - Sep 2019
Generate lyrics 🎵 with the RapGenius API!
Contributions:19 commits, 18 pushes, 1 branch in 28 days
apimusicpythonlyrics
Prisma-Multimodal/ViT-Prisma
Oct 2023 - Jul 2025
ViT Prisma is a mechanistic interpretability library for Vision and Video Transformers (ViTs).
Contributions:2 releases, 7 reviews, 132 PRs in 1 year 8 months
prisma
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