Daavid Stein Email & Phone Number

Portland, OR, US

Tampa, Florida, United States

Research modifications to Bitcoin proof of work algorithms that would enable training AI/ML models on the Bitcoin network, improving transparency and sustainability of AI

• Developed and improved machine learning / AI models in Python and Amazon Web Services (AWS) Sagemaker
• Developed statistical models based on logistic regression and linear regression using statsmodels and py-irt (Python) and R to model knowledge tracing time series
• Performed data analysis using AWS Redshift SQL, DynamoDB, S3, pandas, and numpy to extract insights about users and products
• Communicated results by data visualization using matplotlib and seaborn (Python) for static plots and streamlit (python), Looker (comparable to PowerBI and Tableau) for interactive dashboards
• Conducted statistical experiments such as A/B tests using t-tests and bootstrapping using scipy in Python and Jupyter Notebooks
• Trained PyTorch (Python) transformer (the technology behind LLMs) for knowledge tracing by engineering features, optimizing architecture and training data. This resulted in an improvement of 2% AUC as well as.

• Developed a PyTorch (Python) computer vision model (image classifier) to identify invasive species from remote sensing data as part of ecosystem restoration projects
• Used python libraries such as captum and matplotlib to make deep neural networks explainable
• MLops/Cloud Engineering: Developed and deployed machine learning models into production using AWS Lambda, Cloudformation, EC2, Flask, Swagger, FastApi. Implemented CI/CD using Bitbucket pipelines
• Wrote unit tests and integration tests using pytest and hypothesis testing framework
• Trained and supervised a team of data annotators, created training materials using Confluence and documented best practices for ML annotation. Automated Jira issue creation using Python SDK.
• Used qGIS, shapely and geopandas Python libraries to perform computations on geospatial data

Remote

Tampa/St. Petersburg, Florida Area

Taught programming (C/C++, Python) and mathematics (calculus, linear algebra) to students.

Tampa/St. Petersburg, Florida Area

Developed and delivered STEM presentations to school field trip audiences of up to 150 students.

Taught programming (C/C++, Python) and mathematics (calculus, linear algebra) to students.

Sarasota, Florida Area

Held weekly workshops for first-year data science students to hone their Python skills.

Oldsmar, FL

• Developed python tool to automate version control for databricks by auto-committing and pushing notebooks to dedicated Bitbucket repository.
• Built a Python visualization dashboard using Plotly Dash to report Nielsen’s insights.
• Used the MapReduce paradigm with Pyspark and Spark SQL for distributed computing (big data)

Analyzed Medicare data using R and R shiny, including anomaly detection and visualization, in support of fraud investigations.

Hillsborough County

Tampa/St. Petersburg, Florida Area

Delray Beach, FL

• Helped students with mathematics
• Developed and taught a robotics course with Raspberry Pi
• Taught algebra using Lisp programming language

Plantation, FL

Irvington, NY

• Conducted extensive market research to determine and compile list of potential clients
• Placed 200 cold calls per day to set appointments when not otherwise engaged
• Held meetings with local business owners and professionals to present company products
• Established rapport with store managers and personnel, handled customer service issues

Washington D.C. Metro Area

• Managed Mid-Atlantic Zone (Baltimore, Washington, Virginia Beach, Philadelphia, DE, South NJ)
• Hired, trained, and supervised a team of over twenty salespeople and three District Managers
• Logged and tracked inventory, predicted future needs
• Established rapport with store managers and personnel, handled customer service issues

Ft. Lauderdale, FL

Trained & supervised a team of content developers for SpellingCity.com, an online school curriculum

Master Of Science (M.S.), Data Science

Bachelor Of Science - Bs, Mathematics