# Justin Li

> Software Engineer at Facebook

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

## Work Experience
### Software Engineer @ Meta
Jan 2019 – Present | San Francisco Bay Area
Video infrastructure - encoding fabric

### Software Engineering Intern @ Google
Jan 2018 – Jan 2018 | Waterloo, Canada
Display ads infrastructure: High-throughput services powering Google’s ads lifecycle
• Designed a static analysis tool that parses the ads codebase using graph algorithms and generates annotations to help developers understand when code will execute
• Developed a similar tool that alerts developers to erroneous ads framework usage (such as data dependencies declared but never used)
• Authored a comprehensive beginner’s guide to clang’s abstract syntax tree libraries to help Google engineers jumpstart their static analysis projects

Environment: C++

### Software Engineering Intern @ Facebook
Jan 2018 – Jan 2018 | San Francisco Bay Area
Real-time monitoring: Tools and infrastructure supporting billions of time series data streams
• Designed a search ranking and prediction feature, successfully auto-completing 30% of user queries
• Implemented new operations on time series data, allowing succinct queries by metadata instead of regex

Environment: C++, Hack (PHP), Python, Javascript

### Software Engineering Intern @ The Meet Group
Jan 2017 – Jan 2017 | San Francisco Bay Area
Tagged and hi5: Social media applications
• Designed a de-duplication pipeline and cleanup task in PHP for 1.3 billion photos in order to cut storage requirements by 30% and ease the transition to cloud storage
• Unified and refactored several image processing modules to eliminate redundant metadata, reduce code complexity, and improve cache efficiency

Environment: PHP

### Software Engineering Intern @ Noom Inc.
Jan 2016 – Jan 2016 | Greater New York City Area
Noom Coach: The leading healthy lifestyle application for mobile platforms
• Implemented web sign-up flows in Django and Wagtail, reducing web purchase drop-off rates by 50%
• Expanded the internationalization of the coaching dashboard to accommodate for multilingual usage
• Created dashboard components in React to manage users and their data
• Developed a report generation tool in Python to summarize patient data for a pilot study on eating disorders

Environment: Javascript, Python

### Software Development Intern @ Oracle
Jan 2016 – Jan 2016
Eloqua Team
• Developed a microservice to process transactions of 1+ million contacts per batch
• Took ownership of a feature requested by many clients to import Facebook contacts to Eloqua
• Created responsive configuration UIs in JavaScript, jQuery, and React
• Implemented usage metrics for analytics and cleaned up production logging
• Coached developers with unit testing using Mockito
• Educated the team on proper Git workflows, preventing large conflicts requiring hours to resolve
• Recommended changes to our Agile workflow, reducing sprint estimation inaccuracies

Environment: Java, JavaScript

### Software Engineering Intern - Firmware @ Pebble Tech
Jan 2015 – Jan 2015 | Palo Alto, CA
PebbleOS: Smartwatch operating system
• Implemented a binary protocol in C and Python to improve debugging capabilities over serial communication
• Created calibration applications for the manufacturing pipeline to cut screen alignment variance by 40%
• Refreshed the recovery mode UI, reducing overall resource usage on all watches
• Represented Pebble at outreach events and hackathons of up to 1,000 attendees, teaching them to use the SDK

Environment: C, Python

### Software Engineering Intern @ AeroVelo
Jan 2014 – Jan 2014 | Toronto, ON
Eta Speed Bike: Record holder for the world’s fastest human-powered vehicle
• Created an on-screen display and simulation for pilot training
• Implemented wireless protocols to interface ANT+ sensors with an Arduino, providing real-time data such as heart rate, current speed, and distance travelled
• Researched, benchmarked, and selected appropriate battery technology to optimize for weight and battery life 

Environment: C++


## Education
### Bachelor of Software Engineering in Software Engineering
University of Waterloo
Jan 2014 – Jan 2019

### High School in TOPS Program
Marc Garneau CI
Jan 2010 – Jan 2014


## Contact & Social
- LinkedIn: https://linkedin.com/in/justinli610

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Source: https://flows.cv/justinli
JSON Resume: https://flows.cv/justinli/resume.json
Last updated: 2026-03-22