Dee Velazquez

Software Developer @ JHU

Leveraging my passion for programming, innovation, and scientific discovery, I tackle exciting challenges in computational biology and bioinformatics. My goal is to develop open-source machine learning, statistical, and computational software that empowers researchers to uncover meaningful insights from complex biomedical data, ultimately contributing to a deeper understanding of human health and disease. I'm committed to creating user-friendly tools with strong data visualization principles and plan to pursue a PhD to advance novel methodologies for the broader scientific community.

Featured Projects

A showcase of my work in machine learning, deep learning, computer vision, computational biology, full-stack development, and software development

Spatial Transcriptomics as Rasterized Image Tensors (STARIT)

A pipeline built in R and Python to convert spatial transcriptomics data into pixel-based images for visualizing cell segmentations and RNA species distributions. Utilizes ResNet models, dimensionality reduction techniques (PCA, t-SNE), and clustering algorithms to identify subcellular RNA heterogeneity.

scatterbar: Proportional Data Visualization in R

An R package designed for visualizing proportional data across spatial coordinates through scattered stacked bar plots. Built with ggplot2, dplyr, and tidyr, offering customizable visualizations for spatial data analysis and published on GitHub.

COVID-19 Outcome Prediction Model

A machine learning model built using PyTorch to predict COVID-19 hospitalization and ICU admissions based on CDC surveillance data. Achieved a 94.4% PR AUC score with a Random Forest classifier through hyperparameter optimization and 3-fold cross-validation.

Fatigue Detection System for Road Safety

A real-time drowsiness detection system using OpenCV, Mediapipe, and dlib for facial landmark recognition. Analyzes Eye Aspect Ratio (EAR) and Mouth Aspect Ratio (MAR) to classify driver states, achieving 70.23% accuracy.

OncoBot: AI-Powered Cancer Education Chatbot

A full-stack chatbot developed to provide accessible cancer education to patients and families. Built with HTML, CSS, JavaScript, and React, featuring dynamic chatboxes, response delay handling, and accessibility improvements.

Exploring Supermasks with Genetic Algorithms

A collaboration with Universidad de Madrid exploring the Lottery Ticket Hypothesis through genetic algorithm development for optimizing supermasks in convolutional neural networks, achieving 8.5% performance improvements over random guessing.

Publications

Research contributions in computational biology and bioinformatics

Software

Open-source software projects and packages I have developed

scatterbar

An R package for visualizing proportional data across spatially resolved coordinates through scattered stacked bar plots.

Scatterbar Logo

Technical Expertise

Programming languages, packages, toolkits, software, and systems I work with and am proficient in

Programming Languages

Python R JavaScript Java C++ C Bash

Web Technologies

HTML5 CSS3 React Node.js

Data Science & ML

PyTorch OpenCV Pandas NumPy Matplotlib Seaborn Scikit-learn Plotly ggplot2 dplyr

Tools & Platforms

Git Windows Mac Linux Jupyter Notebooks RStudio

Resume

Download my full resume for detailed information about my experience and qualifications

Dee Velazquez - Resume

Software Developer & Post-bacc Student

PDF • Updated May 2025

Education

B.S. Computer Science & Chemical Engineering

Johns Hopkins University

Experience

Software Developer
JEFWorks Lab

Specialization

Computational Biology
Spatial Transcriptomics
Computer Vision
Deep Learning

Let's Connect

I'm always interested in discussing new opportunities and collaborations! (◕ っ ◕✿)