# Young Jun Choi

> Software Engineer at Circle

Location: Menlo Park, California, United States
Profile: https://flows.cv/youngjunchoi

Software Engineer (Go, Java)

Technical Blog: https://whyjun.github.io

## Work Experience
### Software Engineer II @ Circle
Jan 2024 – Present
Building the Economic OS for the Internet

https://www.arc.network

### Senior Software Engineer @ TSI Incorporated
Jan 2022 – Jan 2024 | Greater Minneapolis-St. Paul Area
IoT Garage
https://tsi.com/discover-tsi/careers/welcome-to-the-iot-garage/

Award: 
- 2023 TSI Change Maker
- 2021 TSI Hackathon People's Choice

### Software Engineer II @ TSI Incorporated
Jan 2021 – Jan 2022 | Greater Minneapolis-St. Paul Area

### Software Engineer @ Arrowstreet Capital, Limited Partnership
Jan 2019 – Jan 2020 | Boston, Massachusetts
Research System - Simulation Systems Engineer (C#, SQL)
• Work in a development team responsible for the portfolio simulation engine of the Research Systems group.

### Software Engineer Intern @ The Beans
Jan 2018 – Jan 2018 | San Francisco
• Worked within an Agile Scrum team developing a web application in Python and React using Test Driven Development.
• Identified the variety of user’s spending patterns and location from 200,000+ transactions by creating metadata.
• Improved categorization algorithm accuracy by 17% to catch miscategorized transactions with metadata analysis and automated transaction categorizer to search them by vendor’s name and user’s location on Yelp and Foursquare.
• Built backup server on AWS EC2 and automated daily/weekly MongoDB backup operations using shell scripting.

### Innovation Fellow @ BU Spark!
Jan 2018 – Jan 2018 | Greater Boston Area
• Designed a prototype of the mobile application that assists law enforcement in identifying signs of labor trafficking.
• Built an MVP app by designing user research process and conducted interviews with Attorneys General office. 
• Simplified searching process to find similar cases from the past by drafting logical reasoning flowchart questions.

### Grader @ Boston University
Jan 2017 – Jan 2018 | Greater Boston Area
• Generated test cases to grade coding assignments accurately with finishing at least 3 days prior to the deadline.
• Graded 80+ students' weekly assignments for CS237 in Spring 2018.
• Graded 200+ students' weekly assignments for CS131 in Fall 2017.

### Research Assistant @ Boston University School of Education
Jan 2016 – Jan 2016 | Boston
• Researched how students negotiate competing priorities by parsing 247 students’ open responses from over 6,000 reports of daily activities and converted them into 504 distinct time use categories with 96% accuracy.

### Sergeant, KATUSA @ Eighth United States Army
Jan 2014 – Jan 2016
• Served in the military as a non-commissioned officer of the U.S. Army Garrison Humphreys.
• Wrote a program manual for Standard Army Maintenance System and held 8 monthly training sessions for new soldiers.
• Supervised daily, weekly, and monthly maintenance reports to assure proper vehicle maintenance operations.


## Education
### Bachelor’s Degree in Computer Science
Boston University

### High School Diploma
Gyeonggi Academy of Foreign Languages


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

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Source: https://flows.cv/youngjunchoi
JSON Resume: https://flows.cv/youngjunchoi/resume.json
Last updated: 2026-04-01