Sonia Joseph

Co-Founder

San Francisco, California, United States7 yrs 11 mos experience
Most Likely To SwitchAI ML Practitioner

Key Highlights

  • Leader of a 160+ member interpretability forum.
  • Co-founded a successful AI startup.
  • Researching advanced machine learning models.
Stackforce AI infers this person is a Machine Learning and AI Research Specialist with strong leadership capabilities.

Contact

Skills

Core Skills

Artificial Intelligence (ai)Deep LearningMachine LearningResearchLeadershipNatural Language Processing (nlp)Data AnalysisFinancial AnalysisData Collection

Other Skills

Statistical Data AnalysisPythonMentoringSoftware DevelopmentWeb ScrapingEvent ManagementCreative WritingInterpersonal SkillsJavaTensorFlowNumPyScikit-LearnPandas (Software)Convolutional Neural Networks (CNN)Matlab

Experience

7 yrs 11 mos
Total Experience
1 yr 4 mos
Average Tenure
4 yrs 6 mos
Current Experience

Mats research

MATS Co-Mentor

Jan 2025Apr 2025 · 3 mos

  • Co-mentor for multimodal mechanistic interpretability for MATS 7.0
MentoringMachine Learning

Meta

Visiting Researcher

Sep 2024Present · 1 yr 8 mos

  • Researcher on the JEPA team for video understanding, building interpretable and physically plausible world models. Leads 160+ member interpretability forum across FAIR, Reality Labs, and GenAI.
ResearchArtificial Intelligence (AI)Deep LearningNatural Language Processing (NLP)Leadership

Ml alignment & theory scholars

2 roles

MATS 6.0 Scholar

Jun 2024Aug 2024 · 2 mos · Berkeley, California, United States · On-site

  • Researching vision sparse autoencoders (SAEs) and interpretability with Lee Sharkey in MATS cohort.
ResearchMachine Learning

MATS 5.0 Scholar

Jan 2024Mar 2024 · 2 mos

  • Researching vision mechanistic interpretability with Neel Nanda. Built the Prisma library, an open source library for vision mechanistic interpretability and sparse autoencoders.
ResearchMachine LearningPython

Mila - quebec artificial intelligence institute

PhD Candidate in Computer Science / Machine Learning

Sep 2023Present · 2 yrs 8 mos · Montreal, Quebec, Canada

  • Research on understanding the internal function of world models and multimodal models.
  • Advised by Professor Blake Richards at McGill's LiNCLab and Dr. Mike Rabbat at Meta.
ResearchMachine LearningStatistical Data AnalysisPython

South park commons

Member

Nov 2021Present · 4 yrs 6 mos

Alexandria labs

Co-Founder

Sep 2021Jan 2023 · 1 yr 4 mos · San Francisco Bay Area

  • Co-founder and CTO. Transitioned to strategic advisory role after successfully guiding company through initial growth stages.
LeadershipSoftware DevelopmentMachine Learning

Neuromatch academy

Neuromatch Deep Learning Instructor

Jul 2021Oct 2021 · 3 mos

On deck

ODF Founder Fellow

Dec 2020Feb 2021 · 2 mos · Palo Alto, California, United States

  • Cohort 6

Janelia research campus

Research Engineer

Aug 2020Jun 2021 · 10 mos

  • Designed and implemented an end-to-end analysis pipeline for receptive field analysis from calcium imaging data in mouse visual cortex at the Stringer Lab
  • Created internal Python library and GUI for receptive field analysis and exploration
  • Built a versatile tool that researchers can use through a visual interface or code
  • Conducted comparative analysis between mouse visual cortex data and optic flow neural nets.
  • Specialized in deep learning and neuroscience data analysis, scientific software development, and computational modeling of visual systems
ResearchMachine Learning

Nlmatics

NLP Research Engineer

May 2020Aug 2020 · 3 mos

  • Led intern research team in evaluating and benchmarking GPT models trained on specialized datasets
  • Optimized pipeline accuracy by 10% through dataset curation and benchmarking
  • Specialized in LLM training, pretraining, and evaluation techniques
  • Conducted novel research on improving LLM training methods, including exploration of RL-based approaches and tokenizer optimization
  • Engineered critical components of a RAG-like system for long-form document retrieval, serving banks and B2B clients
  • Optimized database latency, improving stack efficiency by 30%
  • Contributed to core organizational processes and published research findings on company research blog

Princeton neuroscience institute

Machine Learning Engineer

Sep 2018May 2019 · 8 mos · Princeton University, NJ

  • Wrote thesis on semantic representation in the human brain in collaboration with the Princeton Neuroscience Institute and Google.
  • Leveraged knowledge of data science and machine learning, including methods like PCA and multivariate regression, and Python libraries like Tensorflow, NumPy, scikit-learn, and pandas, to analyze neural response.
Natural Language Processing (NLP)Machine Learning

Ruane, cunniff & goldfarb

Summer Investment Analyst, Sequoia Fund

Jun 2018Aug 2018 · 2 mos · Greater New York City Area

  • Leveraged knowledge of dynamical systems to build models of the homebuilding market.
Machine LearningData Analysis

Ea investments

Investment Analyst

Oct 2017Jul 2018 · 9 mos · Princeton, New Jersey

  • Analyzed financial health of companies for Princeton's only investment organization that donates returns to charity.
Data Analysis

Harvard data science initiative, harvard evolutionary psychology lab

Summer Research Intern

May 2017Aug 2017 · 3 mos · Cambridge, Massachusetts

  • Built database of ethnographic information for the Natural History of Song Project.
  • Implemented web scraper saving 15 hours/week.
Financial Analysis

Princeton envision

Executive Board Member

Apr 2016Nov 2016 · 7 mos · Princeton University

  • Made executive decisions for student-run three-day tech conference on nanotechnology, artificial intelligence, genetic engineering, VR/AR, and nuclear fusion, attended by 154 funded student entrepreneurs, award-winning STEM grads and undergrads, and published PhDs from top universities.
  • Led campaign that increased membership from 70 to 250+ within one year, and organized the recruitment and orientation of 20+ directors.
  • Ran strategy to promote artificial intelligence safety to international conference attendees and the Princeton student body.
Data CollectionWeb Scraping

Museum of science, boston

Public Forums Intern

Jun 2013Aug 2013 · 2 mos · Boston, MA

  • Designed a pilot study on the correlation between air quality and mood in Boston, analyzed data statistically, created air quality activities and presentations for museum guests, and presented results of study in an interactive public forum of policymakers, city planners, scientists, museum staff, and citizens.
LeadershipEvent Management

Education

Princeton University

Bachelor of Arts (B.A.)

Jan 2015Jun 2019

Mila - Quebec Artificial Intelligence Institute / McGill

Doctor of Philosophy - PhD — Computer Science

Sep 2023Present

McGill University

Master's degree — Computer Science

Sep 2021May 2023

Acton-Boxborough Regional High School

High School Diploma

Jan 2010Jan 2014

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