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yiwen song

Personal Site | Email

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Education

University of California, Berkeley - June 2016

Computer Science, B.A.
Major GPA: 3.739

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Work Experience

Release Engineering at Yelp (Nov 2017 - Present)

San Francisco, CA

• Worked on Jenkins continuous deployment and integration of Yelp services.
• Designed and implemented API for determining responsibility and ownership of code, databases, and other resources.
• Improved Git management tools and code review infrastructure to be more resilient to catastrophic failures.

Trading and Data at Old Mission Capital (Aug 2016 - May 2017)

Chicago, IL

• Improved data pipeline and research infrastructure reliability and usability.
• Added parallelism to data ingestion and created automated sanity checking to reduce overhead of analysis.
• Developed a Python package for quickly scripting models and risk calculation on live market data.

Trading Intern at Old Mission Capital (Jun 2015 - Aug 2015)

Chicago, IL

• Studied the effect of US high frequency trading on international markets.
• Used Python (Scikit-Learn, Matplotlib) to analyze data and visualize stastical models.
• Wrote research reports to communicate studies to traders whose products were impacted by the studies.

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Projects

GPU Compression

• Parallelized implementation of LZSS compression for the GPU.
• The goal of the project was to test feasibility of using message compression in HPC applications.
• Result: your network needs to be really bad for this to be worth anything.
• Implemented in CUDA and deployed on AWS.

ImgCompress

• ImgCompress is a hackathon project aimed at becoming the future of compression.
• Uploads binaries to Imgur as PNGs and stores the 7 character Imgur URL.
• Compression ratio is over 700 000 and implementation is less than 200 lines of python.
• Better than the CUDA stuff I made.

Poker AI

• Heads Up Pot-Limit Omaha (HUPLO) AI that uses Monte Carlo search trees and bad machine learning.
• Preflop play uses machine learning on hole cards features like connectedness, suitedness and value.
• Postflop play uses Monte Carlo Search Trees.
• 💩 at poker.
• Passable at Tic-Tac-Toe.

Yet Another Personal Site | DefDontHire.Me

• Technology has advanced to a point where you can create a beautiful website without knowing any web.
• Literally anyone can download a Bootstrap template and write some BS and call it a personal site.
• Exhibit A

yiwen.date

• Another personal site, but maybe a little more personal.
• Frontend written in react, backend written with Flask.
• Please do not attempt to date potential future employees.

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Interests, Skills and Intangibles

Hobbies: Board Games, Poker, Basketball, Reading the Manual
Language: Python, Javascript, Psuedocode, fish, Mandarin
Skills: INDEX-MATCH Fiend, Vim Connoiseur, Nash Equilibrium Hobbyist, "sudo rm -rf /" Frequent User
Intangibles: Enjoys friendly competition, clicks buttons really fast