Arjun Raghunathan
Data Science Student, Class of 2027 | Research Assistant | Python, R, SQL | github.com/example
Seattle, WAarjun.raghunathan@example.com(206) 555-0125Summary
Junior data science major at Puget Sound Technical University, graduating June 2027 with a 3.7 GPA and a statistics minor. Work ten hours a week as a research assistant cleaning and modeling ecological sensor data, completed a summer analytics internship for small-business clients, and placed in the top 5 percent of a public data competition on a demand forecasting problem. Looking for a summer 2026 data science or machine learning internship.
Experience
Undergraduate Research Assistant, Computational Ecology Lab, Puget Sound Technical University
– Present
Seattle, WA
- Built a Python pipeline (pandas, scikit-learn) that cleans and merges readings from 120 stream temperature sensors, about 9 million rows a year, replacing a manual process that took a graduate student two days each month.
- Fit gradient-boosted models to predict missing sensor readings; mean absolute error fell from 0.9 to 0.4 degrees against the lab's previous interpolation method.
- Wrote the lab's data dictionary and a reproducible analysis notebook used by two graduate students for their thesis chapters.
- Co-authored a poster presented at the university's undergraduate research symposium in May 2025.
Data Analytics Intern, Rainier Analytics Group
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Seattle, WA
- Wrote SQL against clients' PostgreSQL and Snowflake warehouses to build weekly sales and inventory reports for three retail clients, replacing exports the consultants had been reshaping in Excel.
- Built a Tableau dashboard for a 22-store regional grocer that flagged slow-moving SKUs; the client used it to cut a product line and still checks it weekly.
- Ran an A/B test readout for an email campaign, including the power calculation the client had skipped, and recommended extending the test two more weeks before deciding.
Team Lead, Public Data Competition (demand forecasting), Independent project, team of three
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Seattle, WA
- Led a three-student team forecasting daily store-item demand for a public competition dataset of 3 million rows, finishing in the top 5 percent of about 1,900 entries.
- Engineered lag and holiday features and ensembled LightGBM with a seasonal baseline, which beat our best single model by 6 percent on the leaderboard metric.
- Published the code and a write-up on GitHub; the write-up is the first repository recruiters are pointed to.
Education
Bachelor of Science in Data Science, minor in Statistics (expected June 2027)
Puget Sound Technical University, Seattle, WA
GPA 3.7. Courses: Machine Learning, Statistical Inference, Regression and Time Series, Databases and SQL, Data Structures, Linear Algebra, Probability, Data Visualization, Experimental Design. Teaching assistant for Introduction to Data Science, spring 2026.
Skills
- Python (pandas, NumPy, scikit-learn, LightGBM)
- R (tidyverse, ggplot2)
- SQL (PostgreSQL, Snowflake)
- Tableau and Plotly
- Jupyter and reproducible notebooks
- Git and GitHub
- Statistical inference and A/B testing
- Time series forecasting
- Feature engineering
- Data cleaning at scale
- Linux command line
- Technical writing
Certifications
- Tableau Desktop Specialist, Tableau,