Open to opportunities

Jose User

@joseuser

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Senior ML & Data Engineer transforming data into actionable insights.

United States

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What I'm looking for

I seek a role that challenges me with innovative projects and fosters collaboration, allowing me to leverage my skills in data engineering and machine learning to drive impactful solutions.

I am a Senior ML & Data Engineer with a decade of experience in architecting scalable ETL/ELT pipelines and deploying innovative machine learning models across various sectors, including healthcare and gaming. My passion lies in transforming complex and messy data into actionable insights that drive real-world improvements. I thrive on designing real-time streaming pipelines in cloud environments, tackling NLP and computer vision challenges, and leveraging Generative AI to deliver intelligent solutions.

At Cigna, I developed secure ETL/ELT pipelines that achieved full HIPAA compliance while transforming multifaceted healthcare data. My work improved data consistency and enhanced predictive model accuracy significantly. I also directed cutting-edge Generative AI projects to automate clinical workflows, ensuring privacy and model performance. My previous role at Niantic involved creating real-time data pipelines for AR games, optimizing data architectures, and implementing robust data governance frameworks, which led to increased player engagement and retention.

Throughout my career, I have focused on leveraging cloud platforms and advanced machine learning techniques to deliver impactful solutions. I am eager to take on new challenges that allow me to continue improving lives through data-driven insights and innovative technology.

Experience

Work history, roles, and key accomplishments

Current

Senior ML & Data Engineer

Current

Cigna

May 2022 - Present (3 years 1 month)

Developed secure ETL/ELT pipelines on Spark (Java/Scala), Python, R, and SQL on AWS/Azure, achieving full HIPAA compliance while transforming multifaceted healthcare data. Managed the complete ML lifecycle using TFX and XGBoost on AWS SageMaker and Azure ML for model training and deployment.

ETL Spark Python R SQL AWS Azure HIPAA)ML Lifecycle XGBoost AWS Sagemaker NLP Generative AI Docker Kubernetes GitHub Actions Apache Airflow

Data Scientist

Niantic Inc

Jun 2018 - Apr 2022 (3 years 10 months)

Created real-time location-based ETL/ELT data pipelines for AR games like Pokémon GO using Apache Kafka and Google Cloud Pub/Sub, processing millions of geospatial player interactions daily. Increased player retention by 15% through building and deploying machine learning models to predict engagement, churn, and lifetime value (LTV) of players.

ETL ELT Data Pipelines Apache Kafka Google Cloud Pub Sub MongoDB Google BigQuery DBT Apache Beam Data Governance Machine Learning A B Testing Fraud Detection Computer Vision Power BI

Data Analyst

Adecco Group

Apr 2016 - May 2018 (2 years 1 month)

Scrubbed and processed large-scale datasets from HR systems, CRM, and financial platforms using SQL and Excel, ensuring data accuracy and generating actionable insights. Developed automated reports and interactive dashboards in Power BI, Tableau, and Excel, tracking critical metrics like time-to-fill, employee turnover, and placement success.

SQL Excel Power BI Tableau Python R Apache Spark Hadoop Predictive Staffing Models Data Analysis Reporting

Backend Engineer

Truelogic Software

May 2014 - Mar 2016 (1 year 10 months)

Used Java to create and update server-side logic, in conjunction with RESTful APIs for web applications, to facilitate data movement between the frontend and backend systems. Achieved desired performance levels for backend services by designing and optimizing SQL queries for MySQL and PostgreSQL.

Java RESTful APIs SQL MySQL PostgreSQL Backend Development Optimization

Education

Degrees, certifications, and relevant coursework

University of California - Berkeley

Master of Science, Data Science

Completed a Master of Science in Data Science, focusing on advanced statistical modeling, machine learning algorithms, and data analysis techniques. Gained expertise in big data technologies and their applications in various industries.

University of California - Berkeley

Bachelor of Science, Computer Engineering

Obtained a Bachelor of Science in Computer Engineering, covering core principles of computer hardware, software, and systems design. Developed a strong foundation in programming, algorithms, and digital electronics.