James Pak Email & Phone Number

Seoul, Seoul, Kr

Search Ranking• Optimize search ranking/reranking models• Drive LLM-based text embedding model• Lead the ranking model online/offline metric dashboard

Los Angeles, California, Us

Global Monetization, Ads Core Ranking• Optimized two-tower based users & ads representation model and research the state-of-the-art users & ads representation model• Improved early-stage pre-ranking model by leveraging the late-stage ranking models with knowledge distillation• Published ads embedding in real-time manner• Designed and implemented ecpm-based premium user clustering algorithm

Redmond, Washington, Us

News & Feeds, Growth Ranking Team• Fine-tuned the state-of-the-art GPT-based LLM to strengthen a self-attention-based two tower user & news model• Built a series of the training data pipelines to explore and enrich high quality features for the user & news model• Designed and implemented position de-biased click model to reduce position bias to the training data• Designed and implemented Thompson Sampling-based exploration and exploitation method to enrich content diversity• Improved the traffic control mechanism to support a healthy and growing content partner ecosystem• Led 20+ Scenario-based A/B Testing such as cold start, local, CF, etc. and improved core online metric (revenue, CI, CTR) by 10+%

Armonk, New York, Ny, Us

IBM Watson Machine Learning• Implemented the system capacity planning calculator based on machine learning technology• Led JPMorgan Chase customer churn detection project based on 13M business banking customers• Improved the existing keyword extraction model by 20% by various NLP technics• Designed an anomaly detector to predict issues on DB2 before they arise by using machine learning model

Pasadena, Ca, Us

• Designed and implemented a dance generator from songs by Machine Learning Model• Researched 3D human pose estimation and 3D full body reconstruction based on deep learning model• Reduced errors by 12% at 3D human pose estimation task as compared to the current state-of-the-art model

Los Angeles, Ca, Us

• Worked on back-end development and natural language processing for a financial services project at Dreamtek Industries through the USC Center for Systems and Software Engineering.• Implemented back-end features to optimize financial services selection and create a true banking API• Contributed to POS and BIO tagger using CRF and product matching & ranking algorithms

Los Angeles, Ca, Us

• Designed Sentiment analyzer which has 91.5% accuracy using hybrid CNN+LSTM model with bi-gram.• Developed Anomaly Detector based on earning conference call log, which uses GRU+Attention model with gradient-clipping and coverage.

Suwon-Si, Gyeonggi-Do, Kr

• Designed the 64Bit Multi-Core Operating System prototype that increases performance by 50% of context switching speed• Handpicked member for core development team that focused on multitasking & multithreading, device drivers, code reviews, and end-to-end integration• Created a Bitcoin mining application on our OS and Ubuntu

Program: Best of Best Program• Acted as project manager to create the Automatic Secure Coding Verification Tool for Android Apps that detects hazardous source code by utilizing approximately 100 rules• Discovered critical vulnerabilities in numerous Android Apps including bank related Apps• Designed the Java Source Code Parser • Published the open source project named "Orroid" at Github

Master'S Degree, Computer Science

Certificate, English Language Program

Bachelor'S Degree, Computer Science