Derek Li Email & Phone Number

Burlingame, California, United States

• Reduced app latency by up to 30% by implementing a Redux caching strategy to replace redundant, heavy API calls.
• Designed and implemented a performance monitoring system providing insight on app performance and areas for improvement using Firebase.
• Configured A/B tests and implemented feature experiments helping grow user retention rates to 10k+ daily recurring users.
• Managed app release cycles, including QA and issue delegation responsibilities, leading to 10+ consecutive weekly releases.

• Built a data annotation tool enabling the processing of tens of thousands of images per week to train machine learning models using React and Ruby on Rails.
• Added dozens of platform interface features providing clients with flexibility and transparency when managing machine learning model generation.
• Reduced code regressions and bugs filed by 10% through introducing and configuring Cypress testing suite into the continuous integration pipeline.
• Researched and prototyped different video decoding libraries (including JSMpeg and ffmpeg) for precise frame extraction, decreasing data outliers and errors by 15% when training ML models.
• Designed a JSON schema for validating data annotation input types for different ML model types including classification and segmentation.

• Merged 10+ pull requests to the Mozilla’s open source dev tool repository.
• Implemented the Debugger’s WhyPaused React component, a feature providing users with information on why the Debugger is paused.
• Refactored the Debugger’s footer and context menu components for smoother rendering and less visual noise.