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I am a fast-learning data scientist-in-training with hands-on experience building end-to-end data pipelines, ML workflows, and AI-assisted tools. I enjoy turning messy data into actionable insights and collaborating across disciplines to solve real-world problems. Currently pursuing a Bachelor of Science in Data Science at UW-Madison, with prior studies in Data Analytics and Biology at Denison University. I have built experience as a data analyst, teaching assistant, and AI prompt engineer, focusing on scalable pipelines, experimentation, and clear communication.…I am a fast-learning data scientist-in-training with hands-on experience building end-to-end data pipelines, ML workflows, and AI-assisted tools. I enjoy turning messy data into actionable insights and collaborating across disciplines to solve real-world problems. Currently pursuing a Bachelor of Science in Data Science at UW-Madison, with prior studies in Data Analytics and Biology at Denison University. I have built experience as a data analyst, teaching assistant, and AI prompt engineer, focusing on scalable pipelines, experimentation, and clear communication.

Preston Zhao

Data Scientist, Data Analyst, AI Engineer, +2

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I am a fast-learning data scientist-in-training with hands-on experience building end-to-end data pipelines, ML workflows, and AI-assisted tools. I enjoy turning messy data into actionable insights and collaborating across disciplines to solve real-world problems. Currently pursuing a Bachelor of Science in Data Science at UW-Madison, with prior studies in Data Analytics and Biology at Denison University. I have built experience as a data analyst, teaching assistant, and AI prompt engineer, focusing on scalable pipelines, experimentation, and clear communication.…I am a fast-learning data scientist-in-training with hands-on experience building end-to-end data pipelines, ML workflows, and AI-assisted tools. I enjoy turning messy data into actionable insights and collaborating across disciplines to solve real-world problems. Currently pursuing a Bachelor of Science in Data Science at UW-Madison, with prior studies in Data Analytics and Biology at Denison University. I have built experience as a data analyst, teaching assistant, and AI prompt engineer, focusing on scalable pipelines, experimentation, and clear communication.

Available to hire

I am a fast-learning data scientist-in-training with hands-on experience building end-to-end data pipelines, ML workflows, and AI-assisted tools. I enjoy turning messy data into actionable insights and collaborating across disciplines to solve real-world problems.

Currently pursuing a Bachelor of Science in Data Science at UW-Madison, with prior studies in Data Analytics and Biology at Denison University. I have built experience as a data analyst, teaching assistant, and AI prompt engineer, focusing on scalable pipelines, experimentation, and clear communication.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Chinese

Fluent

Work Experience

LLM Prompt Engineer at AI Rudder

August 1, 2025 - October 16, 2025

Spearheaded a Pandas pipeline and LLM APIs to automate a three-step dependency model, boosting data production efficiency by 300% while reducing data homogenization and ensuring diverse datasets for robust models. Deployed a bilingual prompting system for English and Chinese, improving control over agent logic and reducing handover failures by 40%. Led initiatives to mitigate function-calling hallucinations by training LLM on 1000+ permutations and aligning auto-judge scoring with human evaluators by 20%. Built a benchmark suite with 100+ test sets to stress-test function-calling across language scenarios, informing model selection.

Data Analyst at Turning Green

March 1, 2025 - October 16, 2025

Designed a Pandas pipeline to clean, standardize, and manipulate 100+ raw California farm and school datasets, increasing data accuracy by 60% with automated filtering and restructuring. Built Selenium-based data integration to scrape farmer bios and crop data, merging into a GeoJSON GIS map to streamline workflows by 50%.

Undergraduate Teaching Assistant at UW-Madison CS Department

August 1, 2025 - October 16, 2025

Supported 80+ students with office hours on recursion, Pandas, SQL, Matplotlib, error handling, and file I/O; Led weekly labs, code-reviewed Python programming assignments, and provided actionable feedback.