Joon Choi Email & Phone Number

Berkeley, Ca, Us

Menlo Park, California, United States

* Utilized Docker compose to initialize the Elastic Stack/fastAPI services and connect JanusGraph to a React visualizer with TypeScript and Express, integrating GraphML preloading via the Apache TinkerPop Gremlin API.* Configured gitlab CI/CD pipeline to run integration tests with pytest and jest, achieving 80% code coverage* RESTful APIs with express and FastAPI to save/load graph state and perform CRUD operations with elasticsearch database, decreasing setup time by 95%.* Added support for Cytoscape, Sigma.js, and Vis-network, rendering 1000+ nodes and edges in under a second, and utilized their APIs to create shift-click/drag node/edge addition, highlighting, and hiding nodes customizations * Created a panel integrating features like node/edge details, graph settings, a custom query builder, and table view, enhancing user interface efficiency by 40% and user satisfaction by 25%, using Material UI.

San Francisco, California, United States

* Generated locations and summaries for 200+ project documents using spaCy and Mistral 7B by configuring a retrievalQA chain with FAISS, increasing WWF’s workflow efficiency and reducing review time by 90%* Queried geospatial data using OpenStreetMap API to obtain GeoJSONS and efficiently visualize Mapbox tilesets using Shapely API into a Folium-based interactive map with search functionality and project specific info, enhancing the organization's ability to analyze global conservation impacts.

* Integrated word by word generation via an eventStream with the OpenAI API into a customer facing chatbot platform built with Django REST framework and React.js, with React Redux for state management and achieved an 80% increase in response speed.* Relayed potential client information to Golang server by using ngrok to test webhook connection with AWS SNS, reducing development time by 60%. * Integrated client data in a table using the AWS DynamoDB SDK, allowing management of lawyers and clients information.* Implemented Firebase authentication and incorporated the Cloud Firestore API to engineer a chatroom service to be utilized as a data annotation tool to finetune OpenAI large language model responses, improving user retention by 45%.

Berkeley, California, United States

- Designed public facing tableau visualizations that illustrate the impact of various homelessness intervention programs on households with and without children in Oakland with data extracted from Alameda County’s HMIS data. Cleaned raw data using pandas, standardizing time data, removing duplicates, etc.

Berkeley, California, United States

* Automated the process of parsing through state medical board’s bulletins and populating relevant data into excel for the years 1997-2022 with Selenium’s webdriver API and Beautiful Soup. * Collaborated with HAAS professors Ambar La Forgia and Mathijs De Vaan and accelerated their research timeline by 80% and showcased results at CDSS Discovery Symposium

Berkeley, California, United States

- Supervise a project team of 5 students, using concepts such as one hot encoding and multiple linear regression on music/mental health data.- Present lecture material on fundamental data science skills such as data cleaning and EDA with pandas to over 100 students.

Berkeley, California, United States

- Facilitated weekly labs, helped students understand course content, and debugged student code in Jupyter Notebook.- Taught concepts such as linear regression, inference, classification, testing, data visualization, and exploratory data analysis.