Caleb Wang

About Caleb Wang

I\'m a Cal grad working. I am interested in creative design, sports, and immersing myself in my surroundings.

Experience

1. Machine Learning Engineer Data Scientist

   Kaiser Permanente

   Jun 2021 — Present · Pasadena, CA, US

   Engineered a RLHF-aligned LLM assistant within a RAG architecture, optimizing retrieval embeddings, vector-store indexing, and inference latency to improve accuracy of domain-specific reasoning.• Trained and calibrated appointment-classification models that improved accuracy by 20%, building reproducible pipelines for data processing, model evaluation, and deployment.• Built a scalable LLM summarization service for unstructured patient messages, implementing efficient tokenization, batching, and prompt-management layers to deliver summaries in 30 seconds per message.• Mitigated data sparsity constraints by creating enriched feature representations and augmentation workflows that improved model resilience and reliability.• Implemented a decision-tree churn-risk system with 90% accuracy, integrating it into upstream data sources, downstream prediction services, and monitoring components that enabled actionable interventions.

Education

• University of Michigan

  Master's degree, Data Science

• University of California, Berkeley

  Bachelor of Arts - BA, Economics

Skills

• Teamwork
• Real Estate
• Powerpoint
• Microsoft Excel
• Investment Research
• Data Analysis
• English
• Retail Sales Analysis
• Fundraising
• Time Management
• Life Insurance
• Social Media
• Microsoft Office
• Microsoft Word
• Public Speaking
• Spanish
• Financial Forecasting
• Marketing
• Chinese
• Communication
• Photoshop