# Crystal Sun

> Software Engineer

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/crystalsun

A data scientist is good at programming and loves visualization.

## Work Experience
### Software Engineer @ Google
Jan 2023 – Present | San Francisco Bay Area

### Data Engineer @ Apple
Jan 2019 – Jan 2023 | San Francisco Bay Area
- Established end-to-end automation test pipelines for evaluating computer vision models, from capturing data, executing model, running evaluation, gathering failure analysis breakdown, and generating visualizations; optimized for the large-scale dataset.
- Designed test cases and built regression datasets for sanity tests, which could quickly generate initial testing reports or find regression fields, to help shorten the test turnaround time.
- Developed tools to visualize computer vision models results, which give more intuitive examples on delivery reports to algorithm developers and management, to help understand the models' performance and triage the failure pattern.
- Developed HTML-based test report delivering the overall model performance and detailed breakdown metrics to help the audience directly get information.
- Built PostgreSQL database + web-based visualization querying tools, which store evaluation metrics, to show the clear trend of model performances

### Technology, Data & Analysis Intern @ San Francisco County Transportation Authority
Jan 2019 – Jan 2019 | San Francisco Bay Area
ConnectSF visualizations [JavaScript (Vue.js, leaflet.js, d3.js) | PostgreSQL | Python]
- Created web-based visualization tools for presenting the number of accessible jobs and trip patterns within San Francisco.
- Designed data pipelines for formatting data, connected database through RESTful API to front-end to enhance security and efficiency.
- Aimed to help planning department interactive with data to make decisions for city transportation in next 50 years.

### Data Analyst @ 链家/Lianjia (Homelink Real Estate Agency Co., Ltd.)
Jan 2017 – Jan 2018 | Qingdao, Shandong, China
Database Administration [MySQL | Hive]
- Established MySQL database from nothing with cleaning historical data with different formats, and built data pipelines for future data importing.
- Responsible for Qingdao branch data demand and querying from headquarter database.

Real Estate City Map [JavaScript (Echarts.js) | MySQL]
- Visualized data on the top of the Baidu map with the locations and information of 200+ stores, 700+ competitor’s stores, and 90% of Qingdao apartments.
- Helped inform decisions regarding the opening of stores or the closing of unprofitable stores.

Employee Separation Rate Prediction [R | MySQL]
- Developed logistic regression models to predict the separation rate of employees.
- Optimized employee management by updating monthly predictions and providing top resignation reasons for individual agents.

### Summer Research Intern @ National Tsing Hua University
Jan 2016 – Jan 2016 | Hsinchu County/City, Taiwan
- Identified good acting parts in videos with Random Forest and Gradient Boosting models in Python.

### Student Employee at University Dinning Services @ University of Minnesota
Jan 2014 – Jan 2016 | Greater Minneapolis-St. Paul Area


## Education
### Master's degree in Data Science
University of San Francisco

### Bachelor of Science - BS in Mathematics
University of Minnesota

### Bachelor of Science - BS in Computer Science
University of Minnesota

### Bachelor of Science - BS in Computer and Information Systems Security/Information Assurance
University of Electronic Science and Technology of China


## Contact & Social
- LinkedIn: https://linkedin.com/in/crystal-xin-sun
- Website: https://crystalxs.github.io

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Source: https://flows.cv/crystalsun
JSON Resume: https://flows.cv/crystalsun/resume.json
Last updated: 2026-04-05