Senior Data Scientist And Machine Learning Engineer
Chesterfield, Mo, Us
B2B company driving digital and AI transformation. I collaborate with customer teams to deliver data analytics and machine learning systems that integrate with client infrastructure.❖ Built and productionized the data pipeline (sklearn, pandas), testing framework, and front-end (HTML, CSS, Javascript) for TextSense, an end-to-end text analytics platform. • Implemented algorithms (nltk, gensim) and visualizations (Altair, Vega-lite) for sentiment analysis, topic modeling, time series forecasting, and network analysis of unstructured text data. Developed novel methods for excitement analysis and aspect sentiment analysis. • Worked with clients in the insurance, sports, consumer electronics, and food industries to analyze survey and social media data to derive actionable insights into consumer sentiment.❖ Led model testing, improvement, deployment, and monitoring of a continually learning, human-in-the-loop fraud detection system (AWS, XGBoost, sklearn) for the California Community College Tech Center. • Built a framework to monitor data processing and results from training and serving pipelines. Diagnosed and resolved a crucial data leakage problem halting deployment. • Collaborated with domain experts to engineer features and optimize hyperparameters, increasing precision and recall by up to 20% Monitored the performance of a continually learning model and the quality of human-in-the-loop labeling. Responded to drops in metrics through customer engagement and model improvement. • Developed model ensembling approach to accommodate shifts in data distribution and combine neural network models (Keras, Tensorflow) with XGBoost to handle both structured and unstructured data.