# Ying Sun

> Staff Software Engineer at Facebook

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

## Work Experience
### Staff Software Engineer @ Meta
Jan 2022 – Present | San Francisco Bay Area

### Senior Software Engineer @ Facebook
Jan 2019 – Jan 2022 | Menlo Park
Instagram ad products

### SDE II / Tech Lead @ Amazon
Jan 2016 – Jan 2019 | San Francisco Bay Area
- Re-architected the legacy ReCommerce Repair System with a generic and extensible external recovery platform solution to provide life cycle tracking of inventory, connect recovery requests to external service providers and boost data-driven decisions
- Led the tech team to accomplish the data storage migration of a stack of applications/services
- Mentored and guided junior engineers
- Wrote up tech roadmap and come up with long-term tech strategies

### Software Engineer II @ SevOne
Jan 2016 – Jan 2016 | Newark, DE
Design/Develop new netflow features (C++)

### Software Engineer @ SevOne
Jan 2014 – Jan 2016 | Wilmington, DE
- Developed new features in netflow collection, aggregator and reporting modules
- Built automation tool for testing
- Assisted in escalated customer support issues

### Programmer/Analyst 03 @ Energy Efficient Buildings Hub
Jan 2013 – Jan 2014 | The Navy Yard, Philadelphia
- Developed building energy simulation web platform: tools.eebhub.org
- Built document-based database (MongoDB) and SQL database and designed the dataflow of simulation platform
- Implemented private cloud infrastructure and setup web servers
- Designed the input user interface of simulation platform

### Graduate Research Assistant @ Penn State University
Jan 2012 – Jan 2013 | University Park, PA
- Lead project on human activity prediction by applying machine learning algorithms, proposed a Mixed Markov Model to extract hidden heterogeneous patterns in human trajectories, exploited EM algorithm to train the model

- Conducted data mining research on social media based disease prediction, wrote Java code to extracted key words in tweets, applied SVM to classify tweets into disease-related and non-disease related tweets

### Project Leader @ Nanjing Noble Electronics Co., Ltd.
Jan 2010 – Jan 2010 | Nanjing, Jiangsu, China
- Built wireless network of image transmission in railway monitoring system


## Education
### Master's degree in Electrical Engineering
Penn State University

### CFA Level 1 Candidate


## Contact & Social
- LinkedIn: https://linkedin.com/in/ysun1912

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Source: https://flows.cv/yingsun
JSON Resume: https://flows.cv/yingsun/resume.json
Last updated: 2026-04-12